np, nd (1930s?). Paperback. Very Good. Item #21-4931
10.5 x 6.5", one sheet, designed to be folded in three for mailing, one side has a promotional letter, the other a colorful image of the French town of Janvry. Postally unused, fold creases, light soiling else good. The laboratory was located at 6504 Chene Street at Milwaukee Avenue, Detroit. "Service to Doctors of Dental-Surgery"