Exhibition catalogue published in conjunction with show held September 23 – October 31, 2009. Catalogue features selected facsimile from the Allan Kaprow workfile published on the occasion of ‘Allan Kaprow Yard'' at Hauser & Wirth, a recreation of an installation originally presented at Martha Jackson Gallery''s exhibition "Environments, Situations, Spaces," May 25 - Juen 23, 1961.