As I remember it, this was at Bell Labs and the protocol later became TCP/IP, but I might be filling in the blanks in my memory incorrectly.
What I'm sure of is that it was critical, at a research lab of some kind, included the statement that the proposal wasn't novel (others did similar things etc), and I recall that the author went on to create an Internet standard out of it later, such as TCP/IP or something similarly important.
Thanks for helping me track down this link.
"A Protocol for Packet Network Intercommunication" by Vint Cerf and Bob Kahn (1974).