SP-4212
On Mars: Exploration of the Red Planet. 1958-1978

Shifting from a 1973 to a 1975 Viking launch brought changes in manpower levels.

Shifting from a 1973 to a 1975 Viking launch brought changes in manpower levels. Martin Marietta personnel numbers were significantly lower for the 1975 mission (1650 vs. about 2200), although JPL figures were not significantly affected (538 vs. about 600). From Langley Research Center, Viking Proj. Off., "Viking Project, Resource Planning Report, July 1970." 30 July 1970.

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