Albert Wohlstetter Dot Com, a project of the Nonproliferation Policy Education Center, is making available a PDF (22.7 MB) of Wohlstetter and Chow’s 1986 PAN Heuristics study on self-defense zones in space:
Albert Wohlstetter and Brian G. Chow, Self-Defense Zones in Space, study for Integrated Long-Term Defense Strategy in partial fulfillment of MDA903-84-c-0325 (Marina del Rey, CA: PAN Heuristics, July 1986).
This website’s bibliography for Albert’s writings will be updated shortly to contain a link to this study.