Underground Comix are known for using different prices, covers (art or color variations) and/or interior content to distinguish between printings.
1st print December 1972 and 2nd print have 0.50 USD cover price. Believed to be indistinguishable from each other.
Character sketches on inside of front cover with indicia information at bottom of page.
Advertisement with illustration for comix from Last Gasp Eco-Funnies on the inside of back cover.