A working erosion model for schools
By: By Don Carlos Ellis ...
Series: U.S. Dept. of Agriculture. Office of Experiment Stations. Circular -- 117; Pamphlets. Miscellaneous -- v. 12; Circular (United States. Office of Experiment Stations) -- 117; Pamphlets -- v. 12
Publisher: Govt. Print. Off.
Published: 1912
Place of publication: Washington
Language: eng
Number of pages: 11
Subjects: Erosion
Notes: "Issued by the Office of Experiment Stations in cooperation with the Forest Service."