Directorios

Enlace: http://www.acnatsci.org/

Descripción: «The Academy of Natural Sciences, founded in 1812, is the oldest continuously operating natural history museum in the Western Hemisphere and has been at the forefront of scientific exploration since the 19th century. At the heart of our research is one of the world's finest natural history libraries, unparalleled in the natural science literature between 1750 and 1950.»