The National Institute of Standards & Technology (NIST) provides "numeric data to scientists and engineers for use in technical problem-solving, research, and development. These recommended values are based on data which have been extracted from the world's literature, assessed for reliability, and then evaluated to select the preferred values. These data activities are conducted by scientists at NIST."
The Physicians Desk Reference provides information about drugs used in medical care.
The free online edition is designed for consumers. Print edition is in Mundt Library is full physician's version; location in Library is REFERENCE RS 75 .P5