University of Arizona

                                             Special Collections will be closed December 20, 2023 through January 1, 2024 in observance of the University Holiday break.

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.