Federal protection of migratory birds Lawyer, George Agustus, 1876- creator text book Washington 1918 1918
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ENG Contribution from the Bureau of biological survey. Also published as Yearbook separate no. 785. Birds Conservation United States United States. Dept. of Agriculture. yearbook, 1918 https://www.biodiversitylibrary.org/bibliography/26595 30459156 10.5962/bhl.title.26595 CUY