Population status of the eastern North Pacific stock of gray whales in 2009
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by A.E. Punt and P.R. Wade. "February 2010." Also available online in PDF. Includes bibliographical references (p. 25-31). 2010 NMFS (National Marine Fisheries Service) AFSC (Alaska Fisheries Science Center) Library Public Domain 1864
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NOAA创建时间：
2021-06-23
