950 resultados para Soil conservation projects
Resumo:
Contribution from Soil Conservation Service.
Resumo:
Contribution from Soil Conservation Service.
Resumo:
Caption title.
Resumo:
Contribution from Soil Conservation Service.
Resumo:
Originally issued August 1940.
Resumo:
Contribution from Soil Conservation Service.
Resumo:
"October 1940."
Resumo:
Prepared in cooperation with Soil Conservation Service, U.S. Geological Survey, N.C. Dept. of Natural and Economic Resources, and N.C. State University Agricultural Experiment Station.
Resumo:
Contribution from Soil Conservation Service.
Resumo:
Chiefly illustrations.
Resumo:
"Issued June 1942."
Resumo:
Cover title.
Resumo:
Includes bibliographical references (p. 159-166).
Resumo:
Issued also as House document no. 289, 84th Cong., 2d sess.
Resumo:
Bibliography: p. 17.