000 00318nam a22001217a 4500
999 _c60147
_d60147
020 _a9789354601286
100 _aRavi P Agrahari
245 _aScience and Technology for Civil Services Preliminary and Main Examinations
250 _a5
260 _aChennai
_bMcGraw Hill
_c2022
300 _axii+632+E.9
942 _cBK