Não informado. (1945). Down to earth: A review of agricultural chemical progress. Down Chemical, Agricultural Products Department.
Chicago-Zitierstil (17. Ausg.)Não informado. Down to Earth: A Review of Agricultural Chemical Progress. Midland, Mich: Down Chemical, Agricultural Products Department, 1945.
MLA-Zitierstil (8. Ausg.)Não informado. Down to Earth: A Review of Agricultural Chemical Progress. Down Chemical, Agricultural Products Department, 1945.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.