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Re:A Practical Guide to Lasers for Experimenters and Hobbyists by weinzierl on Thursday May 19, 2016 @02:21PM (#11732398)
Lasers and the "Holography Handbook: Making Holograms the easy way". It had xkcd style drawings back in the 80s.
Re:A Practical Guide to Lasers for Experimenters and Hobbyists by GregBuchholz on Thursday May 19, 2016 @03:17PM (#11732918)
Except we called them "Forrest M. Mims" style drawings back then.

https://www.google.com/search?q=forrest+m+mims&source=lnms&t...