Add to ORKGFrom introduction: "Report based chiefly on the field work prosecuted during 1905, 1906, 1907, and 1909. It is primarily a characterization of the several major distribution areas or life zones.
Revision of earlier report in this series detailing changes in classification resulting from study o...
Systematic account of the results of a survey made in 1936 and 1937 to aid supervision of the Aleuti...
Brief summary of the geographic distribution, habits, history, and subgenera of Synaptomys
From letter of transmittal: "Report on biological investigations made in the interior of Alaska and ...
From introduction: "Summary of the life zones and mammals of Oregon with emphasis on providing relia...
Characterizes five transcontinental life zones in Wyoming; defines their extent and limits; lists ma...
Summary of the species of mammals native to New Mexico, including a map of the life zones, descripti...
Discusses geography, climate, agricultural practices, and crops of each life zone in New Mexico. Pro...
From introduction: "Result of a study of the spiny pocket mice in the collection of the Biological S...
From letter of transmittal: "The work consists of a systematic study of all the members of the genus...
From introduction: "Synopsis of American voles based on a study of between 5,000 and 6,000 specimens...
In the preliminary survey of the wild life of North America information has been gathered on the bir...
Vol for 1940 issued as Conservation bulletin no. 4 of the U. S. Dept. of the Interior.Mode of access...
From Academy of Natural Science of Philadelphia Journal, v. 15, March 21, 1912.Bibliographical footn...
Collection of reports on Death Valley, the bordering region of California, Nevada, Arizona, and Utah...
Revision of earlier report in this series detailing changes in classification resulting from study o...
Systematic account of the results of a survey made in 1936 and 1937 to aid supervision of the Aleuti...
Brief summary of the geographic distribution, habits, history, and subgenera of Synaptomys
From letter of transmittal: "Report on biological investigations made in the interior of Alaska and ...
From introduction: "Summary of the life zones and mammals of Oregon with emphasis on providing relia...
Characterizes five transcontinental life zones in Wyoming; defines their extent and limits; lists ma...
Summary of the species of mammals native to New Mexico, including a map of the life zones, descripti...
Discusses geography, climate, agricultural practices, and crops of each life zone in New Mexico. Pro...
From introduction: "Result of a study of the spiny pocket mice in the collection of the Biological S...
From letter of transmittal: "The work consists of a systematic study of all the members of the genus...
From introduction: "Synopsis of American voles based on a study of between 5,000 and 6,000 specimens...
In the preliminary survey of the wild life of North America information has been gathered on the bir...
Vol for 1940 issued as Conservation bulletin no. 4 of the U. S. Dept. of the Interior.Mode of access...
From Academy of Natural Science of Philadelphia Journal, v. 15, March 21, 1912.Bibliographical footn...
Collection of reports on Death Valley, the bordering region of California, Nevada, Arizona, and Utah...
Revision of earlier report in this series detailing changes in classification resulting from study o...
Systematic account of the results of a survey made in 1936 and 1937 to aid supervision of the Aleuti...
Brief summary of the geographic distribution, habits, history, and subgenera of Synaptomys