00296    a2200121   4500020001500000082001600015100002100031245004200052250001200094260002900106300001900135650002000154  a0761973699  a300.72bBLA  aBlack, Thomas R.  aUnderstanding social science research  a2nd ed.  aLondonbSAGEc2002g2002  aix,272p.c24cm  aSocial Sciences