1. An Improved Pill or Tablet Machine, British Patent 8599;Noyes,231896
2. Drug & Cosmetic Ind;Chilson,1956
3. United States Pharmacopeia,1955
4. Remington’s Practice of Pharmacy;Martin,1956
5. “Eastman Cellulose Acetate Phthalate,” Distillation Products Industries. Rochester. N. Y.