Arrests on May Day at the mall in Washington, D.C.

General note: Title and date provided by Bettye Lane.

Arrests on May Day at the Mall in Washington, D.C.

General note: Title and date provided by Bettye Lane.

Bella Abzug and Grace Paley at anti-nuclear speak out in Washington, D.C.

General note: Title and date provided by Bettye Lane.

Anti-poverty and anti-nuclear rallies in Washington, D.C.

General note: Title and date provided by Bettye Lane.

Contested Play and Clean Water: McMillan Park, Race, and the Built Environment in Washington, D.C., 1900-1941

This study focuses on the intersection of the politics and culture of open public space with race relations in the United States from 1900 to 1941. The history of McMillan Park in Washington, D.C. serves as a lens to examine these themes. Ultimately, the park’s history, as documented in newspapers, interviews, reports, and photographs, reveals how white residents attempted to protect their dominance in a racial hierarchy through the control of both the physical and cultural elements of public recreation space. White use of discrimination through seemingly neutral desires to protect health, safety, and property values, establishes a congruence with their defense of residential property. Without similar access to legal methods, African Americans acted through direct action in gaps of governmental control. Their use of this space demonstrates how African-American residents of Washington and the United States contested their race, recreation, and spatial privileges in the pre-World War II era.

Guide to trees and shrubs in the grounds of the Executive Mansion : [Washington D.C.] /

Trees and shrubs numbered.

PHYTOPLANKTON AND NUTRIENT DYNAMICS WITH A FOCUS ON NITROGEN FORM IN THE ANACOSTIA RIVER, IN WASHINGTON, D.C. AND WEST LAKE, IN HANGZHOU, CHINA

Nutrient loading has been linked with severe water quality impairment, ranging from hypoxia to increased frequency of harmful algal blooms (HABs), loss of fisheries, and changes in biodiversity. Waters around the globe are experiencing deleterious effects of eutrophication; however, the relative amount of nitrogen (N) and phosphorus (P) reaching these waters is not changing proportionately, with high N loads increasingly enriched in chemically-reduced N forms. Research involving two urban freshwater and nutrient enriched systems, the Anacostia River, USA, a tributary of the Potomac River feeding into the Chesapeake Bay, and West Lake, Hangzhou, Zhejiang Province, China, was conducted to assess the response of phytoplankton communities to changing N-form and N/P-ratios. Field observations involving the characterization of ambient phytoplankton communities and N-forms, as well as experimental (nutrient enrichment) manipulations were used to understand shifts in phytoplankton community composition with increasing NH4+ loads. In both locations, a >2-fold increase in ambient NH4+:NO3- ratios was followed by a shift in the phytoplankton community, with diatoms giving way to chlorophytes and cyanobacteria. Enrichment experiments mirrored this, in that samples enriched with NH4+ lead to increased abundance of chlorophytes and cyanobacteria. This work shows that in both of these systems experiencing nutrient enrichment that NH4+ supports communities dominated by more chlorophytes and cyanobacteria than other phytoplankton groups.

Economic/social impact of occupational noise exposure regulations : testimony presented at the OSHA hearings on the Economic Impact of Occupational Noise Exposure, Washington, D.C.

Mode of access: Internet.

Call to action : better nutrition for mothers, children, and families : December 6-8, 1990, Washington, D.C. /

"This publication has been produced by the National Center for Education in Maternal and Child Health under its cooperative agreement (MCU-117007) with the Maternal and Child Health Bureau, Health Resources and Services Administration, Public Health Service, U.S. Department of Health and Human Services"--Verso of t.p.

Workshop proceedings, special national workshop : prevention and detection of fraud, waste and abuse of public funds : Washington, D.C., November 1979

Proceedings of a workshop sponsored by the Law Enforcement Assistance Administration, Nov. 14-16, 1979

Remarks by Dr. William Haddon, Jr., director, National Highway Safety Bureau, Federal Highway Administration, Department of Transportation, before the National Conference of Women Community Leaders for Highway Safety, Mayflower Hotel, Washington, D.C., November 27, 1967.

Mode of access: Internet.

Inter-parliamentary Conference, Washington, D.C. : Summary record = 42eme Conference Interparlementaire, Washington, D.C. : Compte rendu analatique.

10 numbers in 1 volume; Oct. 9-14, 1953.

Pathways to employment for people with learning disabilities : a national strategic plan from the delegates to the pathways to employment for people with learning disabilities /

Shipping list no.: 92-0402-P.

Report of the Public Meeting on Genetic Engineering for Nitrogen Fixation, held at the National Academy of Sciences, Washington, D.C., October 5-6, 1977 ; edited by Alexander Hollaender.

Mode of access: Internet.