'Duffield's Medicinal Fluid Extracts.' Duffield, Parke and Company, 1868

'Duffield's Medicinal Fluid Extracts.' Duffield, Parke and Company, 1868, Box: 43, Folder: 1. Roy Bird Cook (1886-1961), Collector, Papers, A&M 1561. West Virginia and Regional History Center. https://archives.lib.wvu.edu/repositories/2/archival_objects/53694 Accessed December 19, 2024.