Here are the titles:
PORSCHE RACING MILESTONES, 356 TO 962 by Hal Thoms
PORSCHE 356 & RS SPYDERS, by Gordon Maltby
PORSCHE 356, THE STORY OF THE FLAT-FOUR PORSCHES by David G. Styles
PORSCHE 356 & 550, A PICTORIAL HISTORY by Henry Rasmussen
PORSCHE 356, A PICTORIAL HISTORY by Dr. Brett Johnson
PORSCHE 356 COUPE, CABRIOLOT, ROADSTER, SPEEDSTER & CARRERA by Denis Jenkinson
PORSCHE 356 by Stefano Pasini
Erik