Prev Next Category: Envelope Letter from Zack 1978-09-30 David Zack, USA Section: Correspondence A-Z Sent from: Sandia Park, NM, USA Medium: Paper, Photocopy Category: Letter, Envelope Dimensions (cm): 28 x 21.8 Pages: 6 Subject: duchamp, technincal writing, philadelphia museum of art, formular press, castaneda, egmont