This issue has variants.
Underground Comix are known for using different prices, covers (art or color variations) and/or interior content to distinguish different printings.
1st print April 1970 has 0.50 USD cover price. Has red border on cover.
2nd-4th print have 0.50 USD cover price. All have white border on cover.
Inside front cover.
Indicia information with illustration.
Image on back cover of issue.