APA Citation

Weir, W. W., & Gregory, R. W. (1946). Productive soils. Chicago: J. B. Lippincott Company.

Chicago Style Citation

Weir, Wilbert Walter., and R. W. Gregory. Productive Soils. Chicago: J. B. Lippincott Company, 1946.

MLA Citation

Weir, Wilbert Walter., and R. W. Gregory. Productive Soils. Chicago: J. B. Lippincott Company, 1946.

Warning: These citations may not always be 100% accurate.