00325nam a2200121Ia 4500082002300000100002000023245004200043260003400085300001600119490005800135500000500193700000500198  a658.40331bL628.ET  aLeser, C. E. V.  aEconometric techniques and problemsb  aLondonbCharles Griffinc1974  aviii, 144p.  aGriffin's Statistical monographs and coursesv no. 21  a  a