00485nam a2200157Ia 450000500170000000800410001702000180005804100080007608200140008410000180009824500250011626000540014130000140019565000910020970000270030020191108101120.0190710s9999    xx            000 0 und d  a81-7024-711-X  aeng  a372 B189O  aKumari, B. V. 0aOperation blackboard  aNew Delhib: A P H publishers Corporation, c1996  axv,123p.   aBasic education - India a| Primary education - India a| Education promotion - India   aDigumarti, Bhaskar Rao