1. “Service and Regulatory Announcements, Food and Drug Administration, Foods, Drugs and Cosmetics,” Title No. 2, Part 19, Federal Security Agency (June 1952)
2. “Service and Regulatory Announcements, Food and Drug Administration, Foods, Drugs and Cosmetics,” Title No. 2, Part 20, Federal Security Agency (March 1958)
3. “Service and Regulatory Announcements, Food and Drug Administration, Foods, Drugs and Cosmetics,” Title No. 2, Part 25, Federal Security Agency (June 1952)
4. The Structure of Guaran1