NASA SP-2005-4537. Monographs in Aerospace History Series No. 37. Presents the history of the manned space program from September 1, 1960 to January 5, 1968. Outlines chronologically and in detail the steps taken from the early Mercury days through the operation tests conducted with Gemini, to the qualification of Apollo. Describes the key technical, operational, and management milestones and how key issues in each phase of the space program were resolved