Simmons, R. F. "Storage and retrieval of aspects of meaning in directed graph structures"

[ACM] (1966) [ACM] CACM 9(03) March 1966 includes proceedings of the ACM Programming Languages and Pragmatics Conference, San Dimas, California, August 1965  

Languages mentioned BASEBALL {1961} Constrained natural language for querying attribute value pairs DEACON {1962} English-like query system Protosynthex {1960} Querying system for English test Protosynthex II {1970} Evolution of Protosynthex Quilian semantic network {1964} Original frames system SIR {1963} STUDENT {1964}