On the Formal Semantics of the COMEFROM Statement

Reid, F. X. (March 2006). "On the Formal Semantics of the COMEFROM Statement" (PDF). FACS FACTS. Issue 2006-1. BCS-FACS. pp. 18–20. Retrieved 7 November 2012.

( retrieved from archive.org )

facts200603.pdf

Amateur / Ham Radio Prefix List

( AC6V.COM excellent prefix list, archived just in case )

Radiogram Procedures:

fsd218.pdf