This was linked on HN a few days ago, contains links to dozens of classic papers back to the 1930s:

https://canvas.harvard.edu/courses/34992/assignments/syllabu... - Classics of Computer Science

and that page contains this link to a spreadsheet with links to over 150 historic papers and other sources:

https://docs.google.com/spreadsheets/d/1wS6O7-ZoFL7Cfjgt-kdh...