APA (7th ed.) Citation

National Conservation Tillage Conference Des Moines & Soil Conservation Society of America. (1973). Conservation tillage: The proceedings of a national conference. Soil Conservation Society of America.

Chicago Style (17th ed.) Citation

National Conservation Tillage Conference Des Moines and Soil Conservation Society of America. Conservation Tillage: The Proceedings of a National Conference. Ankeny, Iowa: Soil Conservation Society of America, 1973.

MLA (9th ed.) Citation

National Conservation Tillage Conference Des Moines and Soil Conservation Society of America. Conservation Tillage: The Proceedings of a National Conference. Soil Conservation Society of America, 1973.