26,5:21 cm. Introduction E. Billeter and texts by D. Bourdon, J. Coplans, H.H. Holz, J. Mekas, B. Rose, H. Salzinger, W. Siano. 212 pp. profusely illustrated. Original cardboard covers illustrated with double portrait by Warhol. Catalogue published in conjunction with the exhibition in the Kunsthaus Zürich. Front cover signed by Warhol in black felt pen…