Engelman, Carl "The Legacy of MATHLAB 68"

[SYMSAM 71] (1971) [ACM] Proceedings of the Second Symposium on Symbolic and Algebraic Manipulation, March 23-25, 1971 Los Angeles (SYMSAM 71)  

Languages mentioned MATHLAB {1964} Interactive maths language MATHLAB 68 {1967} Second release of MATHLAB