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DNS and BIND, O'Reilly & Associates, Inc, ISBN 1-56592-512-2, Paul Albitz Albitz, Cricket Liu, 1998, 3rd.

Sendmail, O'Reilly & Associates, Inc, 1997, 2nd, Brian Costales, ISBN 1-56592-222-0.

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Unix Systems for Modern Architectures, Addison-Wesley, Curt Schimmel, 1994, ISBN 0-201-63338-8.

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