Du Bois, Jr., Pierre J.; Martin, Jeanne T. "The LRLTRAN language as used in the FROST and FLOE time-sharing operating systems"

[LSI 1971] (1971) [ACM] SIGPLAN Notices 6(10) October 1971 Proceedings of the SIGPLAN symposium on Languages for system implementation 1971, Lafayette, Indiana, United States; October, 1971  

Languages mentioned LRLTRAN {1968} Vector processing FORTRAN extension