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Soil Survey of Van Zandt County, Texas

Alwin William GokeElmer Grant FitzpatrickZera Calvin FosterW. J. MoranEdwin Noel PoulsonWilliam Isaac Watkins

出版	U.S. Government Printing Office, 1933
URL	http://books.google.com.hk/books?id=hzTDz0-GJWMC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN