000 00292nam a22001217a 4500
020 _a9789386202178
082 _a371.3078
100 _aSivarajan, K.
245 _aEducational Technology
260 _aIndia
_bUniversity Science Press
_c2018
300 _avii.; p. 453
_billustrations
942 _cBK
999 _c295
_d295