Letter from attorney Thomas J. Croff to Carl Hayden informing him of the Atchison, Topeka, and Santa Fe railroad company's ownership of land inside the proposed national park boundaries.

Provides an overview of Pima County's (1) natural, constructed and administrative form makers, (2) the origins and implementation of planning and zoning legislation and regulations, and (3) a decade-by-decade review of some of the major land use decisions made within Pima County since the 1920s.