00293nam a2200085Ia 4500008004100000040003800041100002500079245005700104260004600161211215s9999    xx            000 0 und d  cJayakar Knowledge Resource Centre  aEggenberger, David I 0aMc-graw hill yearbook of science and technology 1968  bMC GRAW HILL BOOK COMPANYaNew Yorkc1968