With that background I wouldn't expect expectise in programming or programming language history. It seems like the latter is actually sort of an actual academic field, albeit a bit small.
https://www.amazon.com/History-Programming-Languages-Thomas-... (including a chapter on CLU/Barbara Liskov) is a fantastic collection of papers from the "ACM/SIGPLAN Second History of Programming Languages Conference".). It was my first purchase from Mr Bezos' UK online book store some time in 1999 or so; I think.
This is her paper from that book:
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