United States Department of the Interior / National Park Service, . Paperback. Slim quarto [26.5 cm] Stapled white, tan and black illustrated wraps. Very good. The wraps are just a little age-toned. There is a previous owner's inscription on the verso of the front cover. Item #37021
From the Introduction- "The river management plan attempts to address and resolve the major issues surrounding the resource, the activity, and the purpose of river running operations within Grand Canyon National Park."