Zap Comix No. 4.

[San Francisco]: Apex Novelties [1969]. First edition, first printing (50c price on front cover, staple 2 5/16 inch from top edge of the book). [48 pp]. Fine in stapled wrappers. Cover art by Victor Moscoso. Contributions by Moscoso, Robert Williams, Robert Crumb, S. Clay Wilson, Gilbert Shelton, Spain Rodriquez, and Rick Griffin. The first comic in the US to be declared legally obscene.