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Rules and Regulations of Bureau of Entomology and Plant Quarantine
United States. Bureau of Entomology and Plant Quarantine
其他書名
Effective June 1, 1939
出版
U.S. Government Printing Office
, 1939
URL
http://books.google.com.hk/books?id=Tb0QAQAAMAAJ&hl=&source=gbs_api