Mechanical Advantage: Tools for the Wild Vertical

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Tools for the Wild Vertical, Volume 2 finale
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1950s USA Climbing Gear notes V2
Mechanical Advantage series by John Middendorf for Volume 3
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INDEX to Mechanical Advantage series
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draft Tools for the Wild Vertical, end of Volume 2
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Big Wall Bivouacs and "camping" part1
Tools for the Wild Vertical by John Middendorf
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Mechanical Advantage: Tools for the Wild Vertical
Mechanical Advantage: Tools for the Wild Vertical
The history of engineered tools for climbing and alpinism (and some environmental rambles). (Looking for D4 portaledges? See bigwalls.net)
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Zion Climbing in the 1930s
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First carabiners for climbing-summary.
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State of the Art Climbing Gear, 1964
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USA adoption of pitons 1920s-1939 Colorado (part A) Ellingwood and Lavender
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Climbing Tools and Techniques—1908 to 1939 (Europe, PartA) Myths and Legends
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