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by Edited by Robert Scribner , Roy Porter , Mikulas Teich
by Bledsoe, Bryan E.; Cherry, Richard A.; Porter, Robert S.
by Porter, Robert S.
by Lynch, Robert Porter
by Elizabeth Warren; Jay Lawrence Westbrook; Katherine Porter; et al.
by Bledsoe, Bryan; Porter, Robert; Cherry, Richard
by Porter, Robert; Porter, Kerry-Ann; MacKenzie, Iain
by Ekins, Richard; Porter, Robert
by Robert L. Porter Jr.