...It is a sufficientanswer to point to the fact, that unrestricted immigrationhas not diminished the value of laborin the Northwestern section of the confederacy... 
W. E. B. Du Bois 「The Suppression of the African Slave Trade to the United States of America」
...Fromthese it is quite evident that in the northwestern half of the Statebuffaloes were once fairly numerous...
William T. Hornaday 「The Extermination of the American Bison」
...I promised in my last letter to describe the barrel trap, says a Northwestern trapper, which I use for capturing rats...
A. R. (Arthur Robert) Harding 「Deadfalls and Snares」
...The caribou of the northwestern wilderness are in a situationpeculiarly their own...
William T. Hornaday 「Our Vanishing Wild Life」
...Colonel Prjevalsky, however, says that thetiger is not found in northwestern China; sothe question remains an open one...
Various 「Hunting in Many Lands」
...Fitch assisted in the collectionof fresh specimens in Oregon and Utah and the unsuccessful search of manya mosquito-infested meadow in southern Wyoming and northwestern Coloradoin July, 1959...
Henry S. Fitch 「Occurrence of the Garter Snake, Thamnophis sirtalis, in the Great Plains and Rocky Mountains」
...We have two additional specimens,both from the relatively dry northwestern Departamento de Chinandega...
J. Knox Jones 「Noteworthy Records of Bats From Nicaragua, with a Checklist of the Chiropteran Fauna of the Country」
...Southeastern United States from central Georgia toVirginia and from northwestern Florida to central Illinois;winters from North Carolina to northern Florida...
Frank M. Chapman 「What Bird is That?」
...What causes this difference in size isnot known, but it is supposed to be due either to the presence of alkaliin most of the Northwestern waters or to the scanty and poor quality ofits natural food...
A. R. Harding 「Fur Farming」
...—"Western Texas, New Mexico, Arizona, southern Utah,southern Nevada, southern California in the Colorado Valley andsouth into northwestern Mexico...
Frank M. Chapman 「Color Key to North American Birds」
...—"Northern Rocky Mountains, from northwestern Montana tothe coast ranges of Oregon and Washington, and northward in BritishAmerica, reaching the Pacific coast of southern Alaska (latitude 60°)...
Frank M. Chapman 「Color Key to North American Birds」
...—"Alaska Territory; casually? south through westernBritish Columbia to northwestern Washington (vicinity of Mt...
Frank M. Chapman 「Color Key to North American Birds」
...—Rocky Mountain region; breeds from Colorado and northeasternCalifornia (?), north to British Columbia; winters from southernCalifornia south to northwestern Mexico...
Frank M. Chapman 「Color Key to North American Birds」
...—"Breeds from southwestern Texas to the Colorado Valley,California, and from Arizona and New Mexico to northwestern Mexico;south in winter to western Mexico; casually to Colorado...
Frank M. Chapman 「Color Key to North American Birds」
...—Great Plains; breeds from northwestern Kansas to Montanaand the Saskatchewan; winters from eastern Colorado and Kansassouth into Mexico...
Frank M. Chapman 「Color Key to North American Birds」
...Lucas and northwestern Mexico...
Frank M. Chapman 「Color Key to North American Birds」
...—Breeding from northwestern Montana and northern Idahonorth to northwest Territory and Alberta; in winter south to Mexico,east more or less irregularly to the Mississippi, Massachusetts, andMaryland...
Frank M. Chapman 「Color Key to North American Birds」
...Birds and Mammalsof Northwestern Colorado, Univ...
Frank M. Chapman 「Color Key to North American Birds」
...nuttalliiwas not common in the Big Bend Country of Texas; this probably is true for northwestern Coahuila as well...
Emil K. Urban 「Birds from Coahuila, Mexico」
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