Salvadori, Mario, 1907- Why buildings stand up : the strength of architecture / Mario Slavadori ; illustrations by Sandra Hooker and Christopher Ragus. - New York ; London : W. W. Norton, 2002. - 323 p : ill. ; 24 cm. Includes index. ISBN: 0393306763 No price Nat. Bib. No.: GBA331306 bnb Subjects--Topical Terms: Structural stability.Buildings. Dewey Class. No.: 690.21