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Reconnaissance Soil Survey of the Lower San Joaquin Valley, California
James William Nelson
J. E. Guernsey
L. C. Holmes
E. C. Eckmann
J. W. Nelson
出版
U.S. Government Printing Office
, 1918
URL
http://books.google.com.hk/books?id=Ewxx0AEACAAJ&hl=&source=gbs_api