TY - BOOK ED - G K TI - Guide to DRDO scientists recruitment exam SN - 9788183550598 PB - G K KW - Defence Research and Development Organisation (DRDO) Mechanical engineering KW - DRDO (Scientis recruitment exam) Mechanical engineering KW - Guide Scientis recruitment exam (Mechanical engineering) KW - Quantitative aptitude Mechanical engineering KW - Scientists recruitment exam DRDO Mechanical engineering ER -