Choices for conservation : final report to the President and Congress, July 1979 /

"SW-779"--p. 2 of cover.

Developing a state resource conservation and recovery program /

Mode of access: Internet.

Proceedings of the annual meeting.

The first meeting, Washington, May 13-15, 1908, was known as the Conference on conservation of natural resources.

Resource conservation and recovery : current reports.

March 1980.

Proceedings of the second Pan American scientific congress, Washington, U. S. A., Monday, December 27, 1915 to Saturday, January 8, 1916.

Contributions in English, Spanish, Portuguese or French.

Eighth International congress of applied chemistry, Washington and New York, September 4 to 13, 1912.

"Members": v. 28, p. 365-463.

How ARS works to manage resources.

Mode of access: Internet.

West Virginia conservation /

Description based on: Vol. 10, no. 1 (Apr. 1946); title from cover.

Native life : bulletin of the society of Friends of Our Native Wild Life.

Mode of access: Internet.

The Conservation volunteer.

Description based on: Vol. 1, no. 2 (Nov. 1940); title from cover.

Conservation 2000 : 12-year report.

Cover title.

Conservation 2000 : six-year report.

"PRT-3219183"--Colophon.

Educational materials and programs : IDNR Division of Education.

"11/08"--Colophon.

Environmental and natural resources information catalog (ENRIC) : a feasibility study /

"Project no. 60.057."

Index to environmental projects performed by agencies of the State of Illinois /

Project no. 80.022.