BSNL JTO - BOOKS, AUTHORS, PLEASE SUGGEST SOME?

FOR PREPARATION OF BSNL JTO - BOOKS, AUTHORS, PLEASE SUGGEST SOME? PLEASE ?

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THE BOOKS WHICH HELPED A LOT WHEN I WAS PREPARING FOR BSNL JTO WHOSE RECRUITMENT IS DONE THROUGH GATE, I USED THESE BOOKS. YOU CAN BUY THEM AND STUDY FROM THEM.

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