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Waterfowl Status Report, 1974

Douglas S. Benning

出版	The Service, 1978
URL	http://books.google.com.hk/books?id=tG8iAQAAIAAJ&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN

註釋

Individuals or organizations that submitted a report have been credited. Although many of the narrative statements have been briefed, and a few tables deleted or shortened if they contained data submitted previously or in another form, the essential information from each report has been retained to the greatest extent possible