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Joint U.S./U.S.S.R. study comparison of effects of horizontal and head-down bed rest

Sandler, Harold, 1929-
Washington, D.C. : National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division ; [Springfield, Va. : For sale by the National Technical Information Service], 1990. 1990

Brain tumors

Greenberg, Harry, 1946-
New York : Oxford University Press, 1999. 1999