Letter, 1940, to Lewis Mumford.
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Perry, Ralph Barton, 1876-1957
http://n2t.net/ark:/99166/w6d5120g (person)
Perry graduated from Harvard in 1897 and taught philosophy at Harvard. From the description of Papers of Ralph Barton Perry, 1891-1957 (inclusive). (Harvard University). WorldCat record id: 76973152 Perry received his A.M. in 1897 and his Ph.D in 1899 from Harvard, and taught philosophy at Harvard. From the description of Public opinion and the Civil War : paper for History 20e, 1896-1898. (Harvard University). WorldCat record id: 77074149 ...