Natural & Physical Sciences Libraries Botany and Horticulture Library The Botany Library and Horticulture Branch Library provide research support for the departments and the large number of botanists world-wide who use the collections and resources. John Wesley Powell Library of Anthropology The Library collection reflects the important role that the Smithsonian Institution played in the development of anthropology as a formal discipline in the United States Joseph F. Cullman 3rd Library of Natural History Museum Support Center Library Serving the research needs of staff at the Smithsonian's Museum Support Center for the purposes of collections storage, research, and conservation. National Museum of Natural History Library The National Museum of Natural History (NMNH) Library consists of the main location (in NMNH's East Court) and 11 specialized collections throughout the NMNH building. National Zoological Park Library Opened in 1898, the National Zoological Park library is one of the oldest in continuing existence at the Smithsonian. Smithsonian Environmental Research Center Library Provides support for the Smithsonian scientists studying ecological systems and processes and SERC's education staff and programs. Smithsonian Libraries Research Annex The Smithsonian Libraries Research Annex (SLRA) holds over 35,000 monographs, over 250,000 periodical holdings, and is the most subject-diverse branch within the Smithsonian Libraries' system. Smithsonian Tropical Research Institute Library The Library supports research, publications, exhibits and public programming of the Institution, as well as those of other museums and research institutions in Central America and Panama.