Air, land & water : activity book /

"Fifth and sixth grades."

Air, land & water : activity book : fifth and sixth grades /

"Materials may be duplicated for classroom/activity use."

An analysis of drag coefficient at hurricane windspeeds from a numerical simulation of dynamical water level changes in Lake Okeechobee, Florida /

"October 1975."

Assessing effects on water quality by boating activity. --

Mode of access: Internet.

1972 OBERS projections; regional economic activity in the United States; by economic area, water resources region and subarea, state, and SMSA and non-SMSA portions of the areas, historical and projected--1929-2020.

"Based on the SERIES 'E' projected national population, Bureau of the Census, 1972."

The activity of PCBs in sediments and water from Lake Calumet and Waukegan Harbor /

"HWRIC Project 88-045."