William J. Duiker/ Jackson J. Spielvogel
(29)
Jackson Spielvogel (The Pennsylvania State University),William Duiker (The Pennsylvania State University)
(3)
Bruce M. Lockhart/ William J. Duiker
(1)
Bruce M. Lockhart/ William J. Duiker/ Jon Woronoff (FRW)
(1)
Georges Boudarel/ Van Ky Nguyen/ Claire Duiker (TRN)/ William J. Duiker (FRW)
(1)
Mark Bradley (EDT)/ Jeffrey Clarke/ William Duiker (CON)/ Mark Bradley/ Luu Doan Huynh (EDT)/ Jayne Werner (EDT)
(1)