1. Time to act! Publication: [Washington] D.C. : American Association for World Health, 1993 Subject(s): Acquired Immunodeficiency Syndrome -- prevention & controlPhilately
2. U.S. postage: nursing Publication: [United States] : [United States Postal Service], 1990 Subject(s): NursesPhilately
3. Dentistry in stamps Publication: [Bethesda, Md. : National Institute of Dental Research, 1988] Subject(s): DentistryPhilatelyExhibits as Topic
