Foster, John, 1941 May 5- Ayer / John Foster. - London ; Boston : Routledge & Kegan Paul, c1985. - xiii, 307 p. ; 24 cm. Includes index. Bibliography: p. 299-304. ISBN: 071020602X : Subjects--Personal Names: Ayer, A. J. 1910-1989. Dewey Class. No.: 192 / FOA 1985