"Machine Intelligence 2", Dale, Ella and Michie, Donald (Eds) Oliver and Boyd, Edinburgh 1968. Proceedings of the Second Annual Machine Intelligence Workshop, University of Edinburgh, September 1966.

Machine Intelligence  

Burstall and Popplestone (1966) Burstall, R. M. and Popplestone, R. J. "POP-2 Reference Manual" Popplestone (1966) Popplestone, R. "POP-1: An Online Language", pp 185-194