Sanders, W. J.; Breitbard, G.; Cummins, D.; Flexer, R.; Holtz, K.; Miller, J. and G. Wiederhold, "An Advanced Computer System for Medical Research", p497

[AFIPS] (1967) [AFIPS] Proceedings of the 1967 Fall Joint Computer Conference FJCC 31  

Languages mentioned PL/ACME {1966} PL/I dialect for medical applications