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How to Use a Slide Rule (with Pictures) - wikiHow
Google Slides: Online Slideshow Maker
Vintage Pickett CREI N-531-ES All Metal Slide Rule w/Case Capitol
Slide rule - Wikipedia
Slide rule Images - Search Images on Everypixel
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National Museum of American History
Search by Category, User's Guide
PowerPoint Tips: Simple Rules for Better PowerPoint Presentations
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view and search my collection of slide rules