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by Maxwell, John C.; Swenson, Richard; Hybels, Bill
by Swenson, Richard A.
by Thompson, A. Richard; Moran, James M.; Swenson, George W., Jr.
by A. Richard Thompson (National Radio Astronomy Observatory); James M. Moran (Harvard-Smithsonian Center for Astrophysics); George W. Swenson (Univ. of Illinois at Urbana-Champaign)
by Swenson, Richard A., M.D.; Butcher, Claton
by Swenson, Richard A.; Butcher, Claton