Evans, Walter H. "Copper sulphate and germination: treatment of seed with copper sulphate to prevent the attacks of fungi." U.S. Department of Agriculture Division of Vegetable and Physiology and Pathology, Bulletin No. 10, 1896.

Evans, Walter H. "Copper sulphate and germination: treatment of seed with copper sulphate to prevent the attacks of fungi." U.S. Department of Agriculture Division of Vegetable and Physiology and Pathology, Bulletin No. 10, 1896., Box: 1. Veterinary Reprint and Pamphlet Collection, 24-4-3369. Division of Rare and Manuscript Collections. https://archives.library.cornell.edu/repositories/2/archival_objects/262493 Accessed December 24, 2025.