Annual meeting of the American Society of Agronomy New Orleans, E. U., Cowan, J. R., & Robertson, L. S. (1969). Papers. Wisconsin, Estados Unidos de América: American Society of Agronomy Inc. ; Crop Science society of America, Inc., Soil Science Society of America, Inc..
Citación estilo ChicagoAnnual meeting of the American Society of Agronomy New Orleans, Estados Unidos), J. Ritchie Cowan, y L. S. Robertson. Papers. Wisconsin, Estados Unidos de América: American Society of Agronomy Inc. ; Crop Science society of America, Inc., Soil Science Society of America, Inc., 1969.
Cita MLAAnnual meeting of the American Society of Agronomy New Orleans, Estados Unidos), J. Ritchie Cowan, y L. S. Robertson. Papers. Wisconsin, Estados Unidos de América: American Society of Agronomy Inc. ; Crop Science society of America, Inc., Soil Science Society of America, Inc., 1969.