Documents by P. Mockapetris
1983, RFC0882: Domain names: Concepts and facilities
1983, RFC0883: Domain names: Implementation specification
1986, RFC0973: Domain system changes and observations
1987, RFC1034: Domain names - concepts and facilities
1987, RFC1035: Domain names - implementation and specification
1989, RFC1101: DNS encoding of network names and other types
1990, RFC1183: New DNS RR Definitions