Appropriate technology [microform] : research in alternative agriculture systems : hearing before the Subcommittee on Natural Resources, Agriculture Research, and Environment of the Committee on Science and Technology, U.S. House of Representatives, Ninety-seventh Congress, second session, September 30, 1982.

"No. 162."

Technical information appropriate for developing countries : selected abstracts from the NTIS database : 1982-1984 supplement /

Includes indexes.

Final report on the development and testing of the robovalve /

AID contract AID/ta-c-1461.

Solar bibliography /

Mode of access: Internet.