Artforum published 8 major pieces written by Robert Smithson. Here is the complete group
Los Angeles & New York: Artforum, 1966–1973. 8 issues with articles by Robert Smithson, as follows: **Volume IV [4], number 10, June 1966. "Entropy and the new monuments." **Volume V [5] Number 10, Summer 1967. "Towards the development of an air terminal site." **Volume VI [6], number 2, October 1967..... More