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- Smalltalk-72 Instruction Manual (1976) [pdf] https://pdfs.semanticscholar.org/442f/0f5205c7d4674612204ecc8357367dabbf45.pdf 19 comments
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- Smalltalk-72 Instruction Manual http://bitsavers.informatik.uni-stuttgart.de/pdf/xerox/parc/techReports/Smalltalk-72_Instruction_Manual_Mar76.pdf 4 comments book , historical , pdf