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 has 0.75 USD cover price.
2nd print has 1.25 USD cover price.
Inside front cover with indicia information at bottom of page.
Character Clyde's last name alternately spelled Hassleroad in other strips.
Inside of back cover.