Letter from Nathan Bankhead to Carl Hayden concerning his sheep and the accusations of Horace M. Albright.

Letter from The Camp Fire Club of America urging Carl Hayden to introduce a bill that would grant National Park status to the Grand Canyon.

This plan was undertaken by the Arizona Department of Transportation Multimodal Planning Division Aeronautics Group to evaluate and recommend a terminal area layout to meet anticipated terminal area demands.

Cooperative National Park Resources Studies Unit for University of Arizona, effects on Glen Canyon Dam releases on Grand Canyon River trips, a technical report, vol. no. 16.