What is soil erosion?

Sonraí bibleagrafaíochta
Príomhchruthaitheoir: Sharpe, C. F. Stewart (Charles Farquharson Stewart) 1907-
Formáid: LEABHAR
Teanga:English
Foilsithe / Cruthaithe: Washington, D.C. U.S. Dept. of Agriculture 1938.
Sraith:Miscellaneous publication / United States Department of Agriculture no. 286
Ábhair: