@book{bhlitem59193, title = {Soils of the eastern United States and their use-- XXXI. The Penn loam }, copyright = {NOT_IN_COPYRIGHT}, url = {https://www.biodiversitylibrary.org/item/59193}, note = {https://www.biodiversitylibrary.org/bibliography/19418}, publisher = {Washington, Govt. print. off, 1912}, author = {Bonsteel, Jay A. (Jay Allan),}, year = {}, pages = {16}, keywords = {Soils|United States}, }