Migratory bird treaty, act, and regulations United States. creator United States. Bureau of Biological Survey. contributor text book [Washington] U.S. Dept. of Agriculture, Bureau of Biological Survey [1921] 1921
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ENG Service and regulatory announcements, 40. Caption title. "Convention between the United States and Great Britain for the protection of migratory birds in the United States and Canada". "Issued June 6, 1921". Birds Conservation Law and legislation United States Wildlife conservation KF5640 https://www.biodiversitylibrary.org/bibliography/57778 6592581 10.5962/bhl.title.57778 NIC