4.
Climb! The History of Rock Climbing in Colorado
by Jeff Achey, Dudley Chelton,...
ISBN: 9780898868760
List Price: $44.95
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Design and Construction of a Liquid Hydrogen Temperature Refrigeration System; NBS Technical...
by Chelton, Dudley B. (Dudley ...
ISBN: 9781015123014
List Price: $11.95