Underground Comix are known for using different prices, covers (art or color variations) and/or interior content to distinguish between printings.
1st print June 1969 has no cover price. Has smooth, glossy heavy stock cover.
2nd print has no cover price. Has matt pebble-textured white heavy stock cover.
3rd print has no cover price. Has matt cross-hatched textured white heavy stock cover.
4th print has 0.35 USD cover price. Has matt pebble-textured cover. Has beige/ivory interior pages.
5th print has 0.35 USD cover price. Has matt cross-hatched texured cover. Has beige/ivory interior pages.
6th print has 0.35 USD cover price. Has matt smooth heavy stock cover. Has beige/ivory interior pages.
7th print has 0.35 USD cover price. Has matt smooth heavy stock cover. Has yellow/cream interior pages.
8th print has 0.35 USD cover price. Has matt smooth heavy stock cover. Has white interior pages.
9th print has 0.35 USD cover price. Has matt smooth regular weight cover. Has white interior pages.
10th print has 0.50 USD cover price. Has glossy white cover. Has white interior pages.