This may not be what you want to hear, but for both of you: APL Programming: A Psychological Model; R. Hooker https://dl.acm.org/doi/pdf/10.1145/800058.801100

This may not be what you want to hear, but for both of you: APL Programming: A Psychological Model; R. Hooker https://dl.acm.org/doi/pdf/10.1145/800058.801100 https://dl.acm.org/doi/pdf/10.1145/800058.801100