Dr. Rockwell's Mustard Plaster. Dunellen, New Jersey: Rockwell Publishing Co., Inc., November 1929

Dr. Rockwell's Mustard Plaster. Dunellen, New Jersey: Rockwell Publishing Co., Inc., November 1929, Volume: Gilbert D278. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/525783 Accessed December 27, 2025.