00285nam a2200109Ia 4500008004100000040001100041100002400052245004800076260002800124300001300152300001000165251112s9999||||xx |||||||||||||| ||und||  aCNCLSA  aProf. M. S. Thacker 0aJournal of Scientific & Industrial Research  cJuly, 1987bVSPaBoston  aP. 1-244  bV. 76