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by Montgomery, Mark R.; Stren, Richard; Cohen, Barney; et al.
by Cohen, Steve M.; Biery, Richard M.
by Cohen, Richard
by Cohen, E. Richard
by Cohen, Marshall; Nagel, Thomas; Scanlon, Thomas; et al.
by Cohen, Richard I.
by Smith, George E.; Cohen, Steve; Brown, Linfield C.; et al.
by Elaine Cohen; Richard F. Riesenfeld; Gershon Elber
by Abcarian, Richard; Klotz, Marvin; Cohen, Samuel
by Richard Cohen