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2. American National Standards Institute (1974). American National Standard Programming Language COBOL ANSI X3.23--1974 New York.]] American National Standards Institute (1974). American National Standard Programming Language COBOL ANSI X3.23--1974 New York.]]
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4. Anderson R. O. and Griswold R. E. (1976) February 18. ACOLYTE; ; ; ; Tucson Arizona: : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : S4PD11b.]] Anderson R. O. and Griswold R. E. (1976) February 18. ACOLYTE; A Document Formatting Program. Tucson Arizona: University of Arizona Department of Computer Science. SNOBOL4 Project Doc. S4PD11b.]]
5. Bailey F. N. Brann J. and Kain R. Y. (1969) August 10. Algebra I Users Reference Manual. Minneapolis Minnesota: : : : Department of Electrical Engineering.]] Bailey F. N. Brann J. and Kain R. Y. (1969) August 10. Algebra I Users Reference Manual. Minneapolis Minnesota: University of Minnesota. Department of Electrical Engineering.]]