Brockman, C. Frank2019-04-032019-04-031953EPM-074-04-057http://hdl.handle.net/20.500.11867/1606610 sheets 12 x 9 inch, bi-folded and secured booklet style. Printed recto and verso. Copyright not renewed.Gives the geological history of Dry Falls and the Grand Coulee before comparing Dry Falls to other things, to get an idea of its size. Black and white photographs throughout.