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	1.	No cover image available Electronic communications/ Dennis Roddy and John Coolen by Roddy, Dennis Coolen, John [jt aut] Material type: Text; Format: print ; Literary form: Not fiction Language: English Publication details: [s.l]: [s.n.], [19--] Availability: Items available for loan: National Library of India (1)Call number: E 621.38 R 613. Place hold Request article Save to lists
	2.	No cover image available Information transmittal and communicating systems/ John Paul Froehlich; edited by John M. Doyle by Froehlich, John Paul Doyle, John M [edt] Material type: Text; Format: print ; Literary form: Not fiction Language: English Publication details: New York: Holt, Rinehart and Winston, c1969 Availability: Items available for loan: National Library of India (1)Call number: E 621.38 F 922. Place hold Request article Save to lists

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