00507nam a22001817a 4500020001800000041001200018082000800030100002000038245005900058260006500117300000800182365000800190650002700198650001100225650002100236650004500257650002300302  a9789352605705  aEnglish  aIFS  aRavi P Agrahari  aScience and technology for civil services examinations  aChennaibMcGraw Hill Education (India) Private Limitedc2017  a672  a695  aScience and Technology  aEnergy  aSpace Technology  aCommunication and Information Technology  aDefence Technology