A Manual of Shoemaking and Leather and Rubber Products
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Awesome free resource written to meet the need for a “general textbook on shoemaking… adapted to meet the needs of industrial, trade, and commercial schools or those who have just entered the rubber, shoe, and leather trades.” The author assumes little to no knowledge on the part of the reader and is very thorough. A must to read if You are really into shoes / boots.
https://www.gutenberg.org/ebooks/55474
Web version:
https://www.gutenberg.org/cache/epub/55474/pg55474-images.html