You're buying the August 1973 issue of Analog Science Fiction magazine.  Condition is very good. 

Table of Contents:

    5 • Giant Step Backward • [Editorial (Analog)] • essay by The Editor

    10 • The Far Call (Part 1 of 3) • serial by Gordon R. Dickson

    52 • The Synchronistic Barometer • [Science Fact (Analog)] • essay by Herbie Brennan

    65 • Stimulus-Reward Situation • short story by Gene Fisher

    78 • Forty Days and Nights • novelette by Rob Chilson [as by Robert Chilson]

    111 • The Analytical Laboratory: May 1973 (Analog, August 1973) • [The Analytical Laboratory] • essay by uncredited

    112 • The Epoxy Goat • novelette by David Lewis

    135 • In Times to Come (Analog, August 1973) • [In Times to Come (Analog)] • essay by uncredited

    137 • The Sweet Smell of the Past • short story by Lawrence A. Perkins

    146 • The Jungle • short story by Karl Hudgins

    159 • The Reference Library (Analog, August 1973) • [The Reference Library] • essay by P. Schuyler Miller 

        

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