00326nam a2200109Ia 4500008004100000020001600041040003800057100002200095245005700117250000600174260003600180211217s9999    xx            000 0 und d  a07-079798-6  cJayakar Knowledge Resource Centre  aLapedes, Daniel N 0aMcgraw-hill encyclopedia of science and techanology.  a1  bMCGRAW HILL BOOKS CO.aNew York