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Gupta, R.
        Indian Forest Service (IFS) Main Exam Zoology : paper-1 & 2 / R. Gupta . – / 2020 edition . – New Delhi : Ramesh, 2020
        Various pages
        Examination conducted by Union Public service Commission (UPSC).
        ISBN9788178129372 :
        1. Zoology         1. Competitive Exam Books         1. UPSC books