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	1.	No cover image available ICAO abbreviations and codes by International Civil Aviation Organization (Canada) [pbl] Series: Procedures for air navigation services Edition: 2nd ed. Material type: Text; Format: print ; Literary form: Not fiction Language: English Publication details: Canada : ICAO, 1967 Availability: Items available for loan: National Library of India (1)Call number: UN629.125 P941(1967)2nd.ed.. Place hold Request article Save to lists
	2.	No cover image available Codes and ciphers: secret writing through the ages/ John Laffin by Laffin, John Material type: Text; Format: print ; Literary form: Not fiction Language: English Publication details: London: Abelard Schuman, 1964 Availability: Items available for loan: National Library of India (1)Call number: E 652.809 L 132. Place hold Request article Save to lists
	3.	No cover image available Cryptography through the ages/ by Dipankar Mukherjee and P. Sarathi Majumdar by Mukharji, Dipankar Majumdar, P. Sarathi Material type: Text; Format: print ; Literary form: Not fiction ; Audience: Adult; Language: English Publication details: Kolkata : The Authors, 2003 Availability: Items available for loan: National Library of India (1)Call number: E 652.8 M 896. Place hold Request article Save to lists

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