00361nam a2200157Ia 4500008004100000020001800041035001000059082001300069100001500082245003300097250000600130260004200136300000900178500001000187650000600197210723s9999||||xx |||||||||||||| ||und||  a0 262 52022 2  a26911  a509BBER  aBernal, J. 0aScience In History  Vol - 4  a-  aCambridgebCambridge University Press  a1328  a21015  a-