Katz, Jesse II.; and McGee, William C. "An experiment in non-procedural programming" pp1-13

(1963)

[AFIPS JCC 24] Proceedings of the 1963 Fall Joint (1963) [AFIPS JCC 24] Proceedings of the 1963 Fall Joint Computer Conference FJCC 1963, Las Vegas, Nev., Nov. 1963,  

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