Master Countdown, [Gemini] Launch Vehicle, Launch GLV-3. Martin Company, 15 March 1965. 8.5 x 11 in. with a spiral binding. Lists minute-by-minute steps to launch the first manned Gemini mission in a column format labeled with header topics of time (T-), direction by, action by, operation, time (T-, again), and item (completed check off column) with two sections on launch recycle procedures and emergency conditions.