Book Darrin Lunde (2017)
The Naturalist: Theodore Roosevelt, A Lifetime of Exploration, and the Triumph of American Natural History. (/isis/citation/CBB801125593/) unapi

Book Ian R. Tyrrell (2015)
Crisis of the Wasteful Nation: Empire and Conservation in Theodore Roosevelt's America. (/isis/citation/CBB627185288/) unapi

Book Clifford Foust (2013)
John Frank Stevens: Civil Engineer. (/isis/citation/CBB366312234/) unapi

Article Erdheim, Cara (2013)
Naturalism's Dietary Discourse: From Fasting Fads to Sinclair's Social Reforms. Food, Culture and Society (p. 633). (/isis/citation/CBB001320896/) unapi

Book Miller, Char (2013)
Seeking the Greatest Good: The Conservation Legacy of Gifford Pinchot. (/isis/citation/CBB001420359/) unapi

Book Lovett, Laura L. (2007)
Conceiving the Future: Pronatalism, Reproduction, and the Family in the United States, 1890--1938. (/isis/citation/CBB000850751/) unapi

Article Sterling, K. B. (2005)
Early Twentieth-Century Mammal Collecting in Africa: The Smithsonian-Roosevelt East African Expedition of 1909-1910. Archives of Natural History (p. 70). (/isis/citation/CBB000530255/) unapi

Book Philippon, Daniel J. (2004)
Conserving Words: How American Nature Writers Shaped the Environmental Movement. (/isis/citation/CBB000641687/) unapi

Book Smith, Neil (2003)
American Empire: Roosevelt's Geographer and the Prelude to Globalization. (/isis/citation/CBB000320228/) unapi

Book Ryan, Frank X. (2001)
Darwin's impact: Social evolution in America, 1880-1920. (/isis/citation/CBB000100000/) unapi

Book Cutright, Paul Russell (1985)
Theodore Roosevelt: The making of a conservationist. (/isis/citation/CBB000064613/) unapi