Advert for the Gutta Percha Speaking Tube (engraving) by English School, (19th century)
How to pronounce gutta-percha - YouTube
Gutta Percha Boat, Employed In The Late Voyage Drawing by English School - Fine Art America
How To Say Gutta-Percha - YouTube
Catalogue of dental materials, furniture, instruments, etc., for sale . lastic Rubber Denture known. DESTAL CATALOGUE. 339 OTHER DENTAL RUBBERS. S. S. Whites No. 1 Improved Dental Gum per lb. $2.75 b.