Invisible City: Philadelphia and the Vernacular Avant-garde. Sid Sachs, Rachel Churner, Mierle Laderman Ukeles, Jennie 

Hirsh, Allan Kaprow, Willoughby Sharp, Pamela Sharp, Robert Venturi. University of The Arts, 2020. 4to. 304 pp. Fine in Near 

Fine dust jacket. Slight rubbing to jacket.