University of Arizona

Students, faculty, staff, and the public are now welcome to visit Special Collections without an appointment from 9 am to 4 pm, Monday through Friday. 

Correspondence Regarding Sulphur Smoke Injury to Crops in the Sulphur Springs Valley, Cochise County, Arizona

This collection contains correspondence primarily between R. B. Streets and J. G. Brown, plant pathologists at the University of Arizona, and Wyatt W. Jones employed by Phelps Dodge Corporation, Copper Queen Branch, Douglas, AZ.