Working erosion model for schools.

Bibliographic Details
Corporate Author:	United States. Office of Experiment Stations
Format:	Government Document eBook
Language:	English
Published:	[Washington] : GPO, 1912.
Series:	Experiment Stations Office Circ. No. 117
Subjects:	Soil conservation. Teaching > Aids and devices. Electronic books.
Online Access:	Connect to the full text of this electronic document

Description
Item Description:	Electronic resource.
Physical Description:	1 online resource (11 pages)