The first of the 13 issues was first published in 1971, with Shelton collaborating on many of the stories with Dave Sheridan and Paul Mavrides.
All issues have multiple printings but without any formal identification, particularly formative editions; Issue printings are only distinguishable by variations in cover coloration, price changes, indicia information or other interior changes.
As such, determining which print requires knowledge and skill, with the possibility that hitherto unknown variants may still be discovered.
Information gathered from http://www.undergroundcollectibles.com/
Issue # | Volume | Publication Date | Pages | Content Items |
#1 12 2 | none | January 1971 | 52 | 68 (56 stories, 1 cover) |
#2 13 | none | March 1972 | 52 | 81 (56 stories, 1 cover) |
#3 12 | none | January 1973 | 36 | 48 (44 stories, 1 cover) |
#4 9 2/1 | none | November 1975 | 52 | 51 (48 stories, 1 cover) |
#5 9 1/1 | none | May 1977 | 52 | 44 (41 stories, 1 cover) |
#6 8 1/1 | none | June 1980 | 52 | 11 (9 stories, 1 cover) |
#7 5 1/1 | none | January 1982 | 52 | 17 (15 stories, 1 cover) |
#8 5 1/1 | none | January 1984 | 36 | 6 (1 story, 1 cover) |
#9 6 1/1 | none | January 1985 | 36 | 6 (2 stories, 1 cover) |
#10 4 2/1 | none | January 1989 | 36 | 5 (1 story, 1 cover) |
#11 3 3 | none | January 1990 | 36 | 9 (7 stories, 1 cover) |
#12 3 2/1 | none | January 1992 | 36 | 16 (14 stories, 1 cover) |
#13 2 2/1 | none | January 1997 | 36 | 19 (16 stories, 1 cover) |