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Telephony

by Sinha, Umesh.

Material type: book Book; Format: print ; Literary form: Not fiction Publisher: New Delhi Satya Prakashan 1999Availability: Items available for loan: [Call number: 621 S617T] (1).

Introduction to Manual Telephony

by Das, P N.

Material type: book Book; Format: print ; Literary form: Not fiction Publisher: Calcutta Modern Book Agency Privete Ltd 1978Availability: Items available for loan: [Call number: 621.385 D229I] (1).