@book{bhlitem57815, title = {Productive farming }, copyright = {NOT_IN_COPYRIGHT}, url = {https://www.biodiversitylibrary.org/item/57815}, note = {https://www.biodiversitylibrary.org/bibliography/40148}, publisher = {Philadelphia, J.B. Lippincott Company, c1912}, author = {Davis, Kary Cadmus,}, year = {}, pages = {392}, keywords = {Agriculture|}, }