in Tor (DC, 1975 series) #3 (September-October 1975)
in Tar Classics (Classics/Williams, 1975 series) #3 (1976?)Response to readers' letters questioning the science and historicity of the first issue.
in Tor (DC, 1975 series) #4 (November-December 1975)
in Tar Classics (Classics/Williams, 1975 series) #5 (1977)Panel-Rama centerspread pin-up forms the first 2 pages.
A second #3 in this series.
First line supplied by Leonard Wolinsky via the GCD Errors list, February 2009.