The
Agency for Toxic Substances and Disease Registry (ATSDR)
is a federal public health agency of the U.S. Department
of Health and Human Services that provides health
information to prevent harmful exposures and diseases
related to toxic substances.
The
National Library of Medicine (NLM), on the
campus of the National Institutes of Health is the
world's largest medical library. The Library collects
materials and provides information and research services
in all areas of biomedicine and health care