...Fisher of the Biological Surveypredicted that the woodcock and wood-duck would both become extinctunless better protected... 
William T. Hornaday 「Our Vanishing Wild Life」
...
—These magnificent monsters present a perplexing problem, which I am inclined to believe can be satisfactorily solved by the Biological Survey only in short periods, say of three or four years each...
William T. Hornaday 「Our Vanishing Wild Life」
...It is very necessary that the regulations for conserving thewild life should be fixed by the Secretary of Agriculture, with theadvice of the Biological Survey...
William T. Hornaday 「Our Vanishing Wild Life」
...Palmer, has considerably changed the workingpolicy of the Biological Survey of the Department of Agriculture,and greatly influenced game protection throughout the states...
William T. Hornaday 「Our Vanishing Wild Life」
...They were compiled andpublished by Henry Oldys, of the Biological Survey...
William T. Hornaday 「Our Vanishing Wild Life」
...With its usual enterprise and forethought, the Biological Survey ofthe Department of Agriculture has published a valuable pamphlet of22 pages on "Silver Fox Farming," by Wilfred H...
William T. Hornaday 「Our Vanishing Wild Life」
...As to the numbers still found the report of the Biological Survey for the years 1895 to 1906, inclusive, but not including the year 1898, shows that bounties were paid on 20,819 wolves in that state...
A. R. (Arthur Robert) Harding 「Wolf and Coyote Trapping」
...A Biological survey of Colorado...
E. Raymond Hall 「A Synopsis of the North American Lagomorpha」
...By utilizingthe combination of many morphological and biological factors, thegenus Smilisca can be defined reasonably well as a natural, phyleticassemblage of species...
William E. Duellman 「Neotropical Hylid Frogs, Genus Smilisca」
...Economic Ornithology [= Biological Survey]...
Frank M. Chapman 「Color Key to North American Birds」
...30, Biological Survey, pp...
Frank M. Chapman 「Color Key to North American Birds」
...Results of a Biological Reconnaissance of Idaho,south of latitude 45° and east of the thirty-eighth Meridian made during thesummer of 1890...
Frank M. Chapman 「Color Key to North American Birds」
...Results of a biological reconnaissance of the Yukon River region...
Rollin H. Baker 「Mammals taken Along the Alaska Highway」
...Thepersons responsible were doubtless inspired by high humanitarianmotives; but it is doubtful if they could have thoroughly considered orforeseen the serious biological consequences of their efforts...
Francis Harper 「The Barren Ground Caribou of Keewatin」
...A biological investigation of the Athabaska-Mackenzieregion...
Francis Harper 「The Barren Ground Caribou of Keewatin」
...The authors of this paper spent the summer of 1920 inwestern Michigan studying the mammals of the region forthe Michigan Geological and Biological Survey...
L. R. Dice 「Notes on the Mammals of Gogebic and Ontonagon Counties, Michigan, 1920」
...Bureau of Commercial Fisheries Biological Laboratory, Auke Bay,Alaska...
Stephen Leatherwood 「Whales, Dolphins, and Porpoises of the Western North Atlantic」
...The specimensconcerned are in the Biological Surveys Collection of the U...
E. Raymond Hall 「Comments on the Taxonomy and Geographic Distribution of Some North American Marsupials, Insectivores and Carnivores」
...115995, in the Biological SurveysCollection, U...
E. Raymond Hall 「Comments on the Taxonomy and Geographic Distribution of Some North American Marsupials, Insectivores and Carnivores」
...Schantz, of the UnitedStates Biological Surveys Collection, I have examined topotypes of D...
E. Raymond Hall 「Mammals Obtained by Dr. Curt von Wedel from the Barrier Beach of Tamaulipas, Mexico」
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