00548    a2200157   450000500170000001000150001702000300003203500140006203700130007608200110008910000220010024501000012226000610022227000850028330000220036820211221155604.0  aENG-130468  a978-93-90113-06-4c499.00  aEN-114000  bDBAD/PUB  a500b1  aAgrahari, Ravi P.  aScience and Technology:cRavi P. AgraharibFor Civil Services Preliminary and Main Examinations  aTamill NadubMcGraw Hill Education Private Limitedc2021  a444/1, Sri Ekambara Naicker Industrial Estate, Alapakkam, PorurbChennaie600116  a744p.c24cm (pbk)