DEC (February 1992) [November 1989]. "Chapter 2: Character Encoding - National Replacement Character Sets (NRC Sets) (Worldwide Models Only)". VT420 Programmer Reference Manual(PDF) (2 ed.). Digital Equipment Corporation. p. 28. EK–VT420–RM.002. Archived(PDF) from the original on 2017-01-29. Retrieved 2017-01-29.
DEC (February 1992) [November 1989]. "Chapter 2: Character Encoding - National Replacement Character Sets (NRC Sets) (Worldwide Models Only)". VT420 Programmer Reference Manual(PDF) (2 ed.). Digital Equipment Corporation. p. 28. EK–VT420–RM.002. Archived(PDF) from the original on 2017-01-29. Retrieved 2017-01-29.