00685nam a22002051 4500 1/14720 990624s1978 enk 1 eng 0195002660 15209 DLC GR-PeUP 901.92 WH White, Lynn. Medieval technology and social change / Lynn White, Jr. London : Oxford University Press , 1978 194 p. : ill. ; 22 cm. Civilization, Medieval. Technology and civilization. Social history Medieval(500-1500) INST UNIPILB MAIN 20040709 901.92 WH 00109987 00109987 LOAN 0 1 /webopac/covers/01/15209_0195002660.jpg