Network Technical Architecture Group. (1978). Message delivery system for national library and information service network: General requirements. Library of Congress.
Chicago-viite (17. p.)Network Technical Architecture Group. Message Delivery System for National Library and Information Service Network: General Requirements. Washington: Library of Congress, 1978.
MLA-viite (9. p.)Network Technical Architecture Group. Message Delivery System for National Library and Information Service Network: General Requirements. Library of Congress, 1978.
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