International Correspondence Schools
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International Correspondence Schools book reviews
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The Building Trades Pocketbook: A Handy Manual of Reference on Building Construction
A great resource on period construction technology
by Matthew, Feb 5, 2019
A wonderful compilation on the state of construction technology , materials and methods from the period.
Plenty of images and diagrams, so this is NOT simply a "gray page" summary of formulas.
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![Placer Mining [microform]: a Hand-book for Klondike and Other Miners and Prospectors, With Introductory Chapters Regarding the Recent Gold Discoveries in the Yukon Valley, the Routes to the Gold Fields, Outfit Required, and Mining Regulations Of...](https://www3.alibris-static.com/placer-mining-microform-a-hand-book-for-klondike-and-other-miners-and-prospectors-with-introductory-chapters-regarding-the-recent-gold-discoveries-in-the-yukon-valley-the-routes-to-the-gold-fields-outfit-required-and-mining-regulations-of/isbn/9781013537097.gif)
