00310nam a2200097Ia 4500008004100000040001100041100002400052245004800076260007800124300001000202251112s9999||||xx |||||||||||||| ||und||  aCNCLSA  aProf. M. S. Thacker 0aJournal Of Scientific & Industrial Research  cJanuary, 1961bThe Council Of Scientific & Industrial ResearchaNew Delhi  bV.20A