Gabriel, Ralph Henry, 1890-1987
Main currents in American history / Ralph H. Gabriel
D. Appleton-Century , 1942
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American studies : topics and sources / editor. Robert H. Walker
Greenwood Press, 1976
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Divine, Robert A.
Since 1945 politics and diplomacy in recent American history/ Robert A. Divine.
Knopf, 1985
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The Maturing of American science : a portrait of science in public life drawn from the presidential addresses of the American Association for the Advancement of Science, 1920-1970 / edited by Robert H. Kargon.
American Association for the Advancement of Science,, 1974
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Baker, Robert H.
Astronomy / Robert H. Baker
D. Van Nostrand, 1964
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