Issue No.09 - September (1974 vol.23)
S.J. Wallach , Raytheon Co. Hartwell Rd.
As APL (A Programming Language) attains its place as one of the widely used programming languages one welcomes a commensurate increase in the number of publications detailing its use and expanding the base from which to gain knowledge.
S.J. Wallach, "B 74-39 A Course in APL/360 with Applications", IEEE Transactions on Computers, vol.23, no. 9, pp. 990-991, September 1974, doi:10.1109/T-C.1974.224073