1. Research Associate, USN/NBS, Naval Dental School, Bethesda, Maryland 20814, Dental and Medical Materials, Polymers Division, National Bureau of Standards, Gaithersburg, Maryland 20899
2. Dental and Medical Materials, Polymers Division, National Bureau of Standards, Gaithersburg, Maryland 20899
3. Dental Clinic, USN Submarine Base, Groton, Connecticut 06340
4. Naval Dental School, Bethesda, Maryland 20814