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.
Mars: Exploration of the Red Planet. 1958-1978
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