1. Canter Lectures on Gutta-Percha;Obach,1898
2. India Rubber and Gutta-Percha;Seelingmann,1910
3. India Rubber and Its Manufacture;Terry,1907
4. Practical Treatise on Caoutchouc and Gutta-Percha;Brannt,1883
5. All About Rubber and Gutta-Percha;Ferguson,1889