(1999). UPSC (IES) Engineering Services Examination Papers: Solved and Unsolved in General Studies. G.K.
শিকাগো স্টাইলে সাইটেশনUPSC (IES) Engineering Services Examination Papers: Solved and Unsolved in General Studies. Jabalpur: G.K, 1999.
এমএলএ সাইটেশনUPSC (IES) Engineering Services Examination Papers: Solved and Unsolved in General Studies. G.K, 1999.
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