00381nam a2200133 a 4500008004100000050001500041100002000056245006500076250001200141260003100153300002400184350000900208650003000217120416s1951    xx |||||||||||||| ||    u  aQE 509 Int  aGutenberg, Beno10aInternal constitution of the earthcedited by Beno Gutenberg  a2nd ed.  abDover Publicationsc1951  a(viii), 439p. : ill  a0.00  aEARTH--INTERNAL STRUCTURE