Information on the efforts of the Arizona-Sonora Water Task Force as part of the Border 2012: U.S.-Mexico Environmental Program to improve environmental quality in the area along the Arizona Sonora border.

Information on the efforts of the Ambos Nogales Air Task Force as part of the Border 2012: U.S.-Mexico Environmental Program to improve environmental quality in the area along the Arizona Sonora border.

Letter of introduction for Dwight B. Heard on the arrival of National Park Service Director Stephen T. Mather to Phoenix. Mather's visit includes trips to Roosevelt Dam and Tumacácori.

Letter from Dwight B. Heard, president and publisher of The Arizona Republican, to Carl T. Hayden about a visit by Stephen Mather.