Set of Delco Electronics manuals for all four Skylab flights, as well as the Apollo-Soyuz test project, including duplicate copies of two Skylab manuals. Documenting the guidance and navigation systems of the Apollo Command and Service Modules used on these missions, the manuals have sections on "CM Software," "ASPO 45 CRT Displays," "Launch and Burn Schedules, Burn Perturbations," "Digital Autopilot," "Science," "Interfaces," and "Hardware." They contain numerous diagrams, instructions, lists, and code definitions related to the guidance and navigation system, including the Apollo Guidance Computer (AGC).
Includes: "Skylab I & II Program Description" (marked "G. L. Silver" on the edge); "Skylab III Program Description" (three copies, one marked "R. Larson CSDL," one marked "Geo. L. Silver," and one unmarked); "Skylab IV Program Description" (two copies, one marked "Larson" and one marked "G. L. Silver"); and "Apollo-Soyuz Test Project (ASTP) Program Description" (marked "Larson"). In overall very good to fine condition, with some annotations inside and general wear from use.
