The Computer Journal 19(1) February 1976

The Computer Journal  

Atkinson, L. V. (1976) Atkinson, L. V. "The List Processing Language, SLPL - An Informal Outline" Napper, R.B.E. et al, (1976) Napper, R.B.E. et al,"ALEC A User Extensible Scientific Programming Language" pp25-31.