Metro Transportation Library and Archive:
PERyScope, September 1950
Metro Transportation Library and Archive:
PERyScope, January 1953
Metro Transportation Library and Archive:
PERyScope, February 1953
Metro Transportation Library and Archive:
PERyScope March 1953
Metro Transportation Library and Archive:
PERyScope April 1953
Metro Transportation Library and Archive:
PERyScope May 1953
Metro Transportation Library and Archive:
PERyScope June 1953
Metro Transportation Library and Archive:
PERyScope July 1953
Metro Transportation Library and Archive:
PERyScope August 1953