An Alternative Approach to Mutual Recursion in Algol 60 Using Restricted Compilers CACM April, 1974 Balfour, A. Algol 60, mutual recursion, compiler restrictions 4.12 4.22 CA740412 JB February 1, 1978 10:32 AM 2658 4 2658 2551 5 2658 2658 5 2658 2658 5 2658 2658 5 2658