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Soil Survey of the Amador Area, California
Darrell Gene Grice
Harold P. Dickey
Harold R. Sketchley
James Wilton Green
William Roy Swafford
Quinten Lee Markley
Wayne Eldon Richardson
出版
U.S. Department of Agriculture, Soil Conservation Service
, 1965
URL
http://books.google.com.hk/books?id=nDtZzgEACAAJ&hl=&source=gbs_api