000 00480nam a2200145Ia 4500
008 190516s9999 xx 000 0 und d
100 _aMathur, Ladli Mohan
_915681
245 0 _aPlanning Producing and Presenting Inexpensive Instructional Materals and Devices
260 _bIndian National Teaching Aids Research & Servics
_c1978
_aNew Delhi
300 _a234
600 _tPure Science
_9124048
650 _aPure Science
_9124048
942 _cBK
999 _c115556
_d115556