Mechanical Advantage Series by John Middendorf
3
Mechanical Advantage Series by John Middendorf
2
Mechanical Advantage Series by John Middendorf aka Bigwall Scrapbook
2
Mechanical Advantage Series by John Middendorf
sidebar to the tools and techniques stuff
6
USA Adoption of pitons 1920-1939. Mechanical Advantage series (USA partC) by John Middendorf
2
USA adoption of pitons 1920s-1939 (part B) East Coast USA 1927-1933 (continuing mechanical advantage series by john middendorf)
Mechanical Advantage series by John Middendorf
2
big wall climber
5
Mechanical Advantage Series by John Middendorf
8
Mechanical Advantage Series by John Middendorf
1
The development of big wall tools and techniques by John Middendorf IV
1