Rules for Downgrading Messages from X.400/88 to X.400/84 when MIME Content-Types are Present in the Messages. H. Alvestrand, J. Romaguera, K. Jordan. August 1993. http://www.faqs.org/rfcs/rfc1496.html
Party MIB for Version 2 of the Simple Network Management Protocol (SNMPv2). K. McCloghrie, J. Galvin. April 1993. http://www.faqs.org/rfcs/rfc1447.html