The National Library of Medicine (NLM), on the campus of NIH in Bethesda, Maryland, is the world's largest medical library. It collects materials in all major areas of the health sciences and to a lesser degree in such areas as chemistry, physics, botany and zoology. The collections stand at 5 million items--books, journals, technical reports, manuscripts, microfilms, photographs and images. Housed within the Library is one of the world's finest medical history collections of old (pre-1914) and rare medical texts, manuscripts, and incunabula.

Web site of the American Academy of Family Physicians, a medical specialty society that represents more than 93,700 family physicians and medical students.

Physician-monitored info and opportunities to connect with others about pulmonary/respiratory/breathing disorders such as asthma, TB, sarcoidosis, COPD/emphysema, and bronchitis.