Environmental science; challenge for the seventies.

Mode of access: Internet.

A new system of practical astronomy : made plain and easy to those who have not studied mathematics : containing the elementary principles of the science, all the rules and tables necessary for making all the calculations for an almanac ... /

Includes index.

Environmental science centers at institutions of higher education; a survey prepared for the Subcommittee on Science, Research, and Development of the Committee on Science and Astronautics, U.S. House of Representatives, Ninety-first Congress, first session.

"Series H."

Soil biology as related to land use practices : proceedings of the VII International Soil Zoology Colloquium of the International Society of Soil Science (ISSS) /

Item 473-B-1

Environmental statement, Tellico project /

Photocopy. Springfield, Va. : Reproduced by National Technical Information Service, [197-]

Radio science.

"Journal of the United States National Committee, International Union of Radio Science."