This issue has variants.
Underground Comix are known for using different prices, covers (art or color variations) and/or interior content to distinguish between printings.
1st print (June) 1973 has 0.75 USD cover price.
2nd print (1976) has 0.75 USD cover price. Indistinguishable from 1st print?
3rd print (1978) has 1.00 USD cover price.
4th print (1980) has 1.25 USD cover price.
Inside front cover with indicia information at bottom of page.
Sequence ends on inside of back cover.