000 00259nam a22000977a 4500
082 _a371.27
_bPIL.P
100 _aPILLAI,N P
245 _aUNIVERSITY OF KERALA:
_bEXAMINATION RESEARCH UNIT
260 _aTRIVANDRUM:
_bDEPARTMENT OF EDUCATION,
_c1962.
942 _cBK
999 _c326997
_d326997