00346nam 2209000 45000010005000000030023000050050009000280080041000370820008000780200018000861000016001042600032001202500006001522450044001589000StarLibrary Marc Built20180430201711 ||||| |||||||||||amh  a519 a0-632-01501-2 ap. armitage bBlackwell Scientific c1987 a2 aSTATISTICAL METHODS IN MEDICAL RESEARCH