Set contains April and June 1963; Feb. and November 1964; March, May, July and Sept.1965; March, August and November 1966; Feb. and May1967; issue 24 and 25 1970 and issue 26 1971. Some of the authors are: Larry Niven, Philip Jose Farmer, Zenna Henderson, Frederick Pohl, Lin Carter, Piers Anthony, John Jakes, Arthur C. Clarke et. at.