00286nam a2200109Ia 4500008004100000020001800041082001500059100001600074245004200090260003200132300001200164190710s9999    xx            000 0 und d  a93-83070-13-8  a371.3078 S  aSharma, R A 0aTechnological foundation of education  aMeerutbVinay Rakhejac2013  axii,792