00375nam a22001457a 4500003000400000005001700004008004100021020001800062040002300080050001400103082001400117100002500131245002700156260004600183OSt20211005171307.0211005b        |||||||| |||| 00| 0 eng d  a0-19-261636-6  cHawassa University  a615.7/SIL  a615.7/SIL  aSilverman William A.  aHuman Experimentation   aNew York bOxford University Press c1985