2012 - On the Trail of the Ice Age Floods Northern Reaches (Paperback) ISBN-13: 9781879628397 ISBN-10: 1879628392 ? 2006 - On the Trail of the Ice Age Floods a Geological Field Guide to the Midcolumbia Basin (Paperback) ISBN-13: 9781879628274 ISBN-10: 1879628279 1 |