Dixon, Paul J.; and Sable, J., "DM-1 -- A generalized data management system," pp185-198

[AFIPS] Proceedings of the 1967 Spring Joint Compu (1967) [AFIPS] Proceedings of the 1967 Spring Joint Computer Conference, April 18-20, Atlantic City, N. J. SJCC 30  

Languages mentioned DM-1 {1967} Data Manager 1