The Key of Lisp (1987)

This is hosted on the website of Mary S. Van Deusen, who seems to be the editor of the Journal where this article was published in. I really recommend looking at the other parts of her website[1], especially if you're interested in the history of computer science / programming [2]. Her YouTube Channel also contains interesting Videos [3]. I'm too young and did not live at that time, but I'm happy that she preserves these materials.

[1] http://www.iment.com/maida/

[2] http://www.iment.com/maida/map/computers.htm

[3] https://www.youtube.com/watch?v=VvU3pJbZBj0