00310nam a2200133Ia 4500008004100000020001800041082001200059100001900071245002500090260002600115260000900141300001000150650001600160240717s9999    xx            000 0 und d  a9788181422583  a510 CHO  aChaudhary etal 0aDicrate Mathematics   bRBD Publication house  c2022  a11.14  aMathematics