BiblioVault may have an electronic file which would meet your requirements for this title:
Indian Life on the Northwest Coast of North America as seen by the Early Explorers and Fur Traders during the Last Decades of the Eighteenth Century
Erna Gunther
Paper: 978-0-226-31089-3
Cloth: 978-0-226-31088-6
Electronic: 978-0-226-31087-9