Soils of the eastern United States and their use--
Subtitle: XXXI. The Penn loam.
By: By Jay A. Bonsteel ...
Series: United States. Dept. of Agriculture. Bureau of Soils. Circular -- no. 56
Publisher: Govt. print. off.
Published: 1912
Place of publication: Washington
Subjects: Soils -- United States.
Other titles: Penn loam.