Unpopular essays [microform] / Bertrand Russell. Russell, Bertrand, 1872-1970. Microfilm 90/4567 (B) 104 RUU Call number of original: B1649.R93U5 1951. Master microform held by: DLC. Microfilm. Washington, D.C. : Library of Congress Photoduplication Service, 1990. 1 microfilm reel ; 35 mm. New York : Simon and Schuster, [1951] 1990. [1951] 1990 Text 175 p. ; 1 microfilm reel ; 35 mm. eng