Todo lo que quiso saber sobre fotografía, desde como sacar una foto, los diferentes tipos de camaras fotograficas, las soluciones, la quimica de la fotografia y el revelado, etc. En español.

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. Hous