00318nam a2200121Ia 4500008004100000040003800041100001600079245003500095250000600130260003500136300001100171653001400182211215s9999    xx            000 0 und d  cJayakar Knowledge Resource Centre  aBancroft, H 0aIntroducation to biostatistics  a1  bHarper and RawaNew Yorkc1966  a210 p.  aChemistry