000 00304nam a2200109Ia 4500
008 211214s9999 xx 000 0 und d
040 _cJayakar Knowledge Resource Centre
100 _aRoss, James s.
245 0 _aGroundwork Educational psychology
260 _bG. G. Harrap co.
_aLondon
_c1951
942 _c1
999 _c27962
_d27962