David Grene/ Robert Pippin (FRW)
(1)
Joseph Raz/ Christine M. Korsgaard/ Robert B. Pippin/ Bernard Williams/ R. Jay Wallace
(1)
Joseph Raz/ R. Jay Wallace/ Christine M. Korsgaard/ Robert B. Pippin (CON)/ Bernard Williams (CON)/ Robert B. Pippin
(1)
Robert B. (University of Chicago Pippin USA)
(1)
Robert Pippin/ Andrew Feenberg/ Charles P. Webel (EDT)
(1)