The information in this report is based on telephone interviews with 700 registered voters. One random sample of 500 registered voters was selected from all registered voters living in Arizona. This sample was proportionately stratified so that voters in each of Arizona’s 15 counties were included in the sample. An additional sample of 100 interviews with registered voters living in Pima County was also interviewed. A third random sample of 100 registered voters living in the more rural counties also was interviewed. The purpose of selecting the two smaller samples was to create sub-samples of Pima County and rural voters that could be compared with the opinions of voters in Maricopa County.

Letter from Joseph J. Cotter to Carl Hayden detailing the approximate amount of patented land within the proposed borders of the national park. Thomas J. Croaff is mentioned in his belief that he owns half the land in the proposed area; however, Joseph J. Cotter disputes this claim. Ralph Cameron's mining interests in the park are also mentioned. Circa 1917.