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	1.	No cover image available Principles of telegraphy/ A.K. Jain by Jain, A.K Material type: Text; Format: print ; Literary form: Not fiction Language: English Publication details: Delhi: New Heights, 1979 Availability: Items available for loan: National Library of India (1)Call number: E 621.382 J 199. Place hold Request article Save to lists
	2.	No cover image available Principles of telegraphy/ N.N. Biswas by Biswas, N.N Material type: Text; Format: print ; Literary form: Not fiction Language: English Publication details: New York: Asia Pub, 1964 Availability: Items available for loan: National Library of India (1)Call number: E 621.382 B 545. Place hold Request article Save to lists
	3.	No cover image available Line telegraph/ P.N. Das by Das, P.N Edition: 2nd ed. Material type: Text; Format: print ; Literary form: Not fiction Language: English Publication details: Calcutta: Modern Book Agency, 1965 Availability: Items available for loan: National Library of India (1)Call number: E 621.382 D 26. Place hold Request article Save to lists
	4.	No cover image available Telegraph spans in terms of weight of wire per unit lenth / H. A. Mallock by Mallock, H. A Material type: Text; Format: print ; Literary form: Not fiction Language: English Publication details: Calcutta : Printed at the Govt.Telegraph Press , 1881 Availability: Items available for loan: National Library of India (1)Call number: 131.E.3. Place hold Request article Save to lists

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