https://openlibrary.org/books/OL5442259M.opds Big wall climbing 2023-01-17T06:30:53Z Doug K. Scott https://openlibrary.org/authors/OL774250A/Doug_K._Scott Oxford University Press New York 1974 xii, 348 p. : Includes bibliographical references and index. eng https://openlibrary.org/books/OL5442259M https://archive.org/details/bigwallclimbing00scot urn:ISBN:0195197674 1149210 73092318