Annual Earth Resources Program Review.

Manned Spacecraft Center (U.S.)

Environmental Living Program.

United States. National Park Service.

Project: Earthsave

Kurt Brand

Agricultural Research Program

U.S. Atomic Energy Commission

Agricultural Program

U.s. Program for the Geodynamics Project

Land Utilization Program; Project Location Maps.

United States. Soil Conservation Service.

Foreign Field Research Program.

National Research Council (U.S.). Division of Earth Sciences

Rural Environmental Assistance Program.

United States. Agricultural Stabilization and Conservation Service. Data Systems Division.