The history of North American waterfowl surveys
Subtitle: 50 years & still counting
By: U.S. Fish and Wildlife Service
Publisher: U.S. Fish & Wildlife Service
Published: 2004
Place of publication: Arlington, Va
Language: eng
Format: [electronic resource] :
Subjects: Birds; Conservation; Waterfowl
Notes: Title from title screen (viewed July 15, 2009).

"December 2004."

Mode of access: Internet from the FWS web site. Address as of 7/15/09: http://library.fws.gov/Bird_Publications/waterfowlpop_surveys_history.pdf; current access available via PURL.