FTP server-server interaction - II
RFC 478, “FTP server-server interaction - II”, is an Unknown document published in March 1973 by R.D. Bressler, R. Thomas. The canonical text is published by the RFC Editor.
What “Unknown” means
The standards-track status of this early RFC was never formally classified.
The canonical text of RFC 478 is hosted at rfc-editor.org. Available in TXT,HTML.