00322nam a2200109Ia 450000500170000000800410001708200150005810000260007324500710009926000320017030000100020220260205105039.0260111s9999||||xx |||||||||||||| ||und||  a505  R137B  aRajeev,Rajender Kumar 0aBaal gyan vigyan encyclopedia: ped paudhe/by Rajender Kumar Rajeev  aNew delhibPustakayanc1991  a159p.