United States Geological Survey (USGS) LibraryHolds over one million books and journals, 450,000 maps, 370,000 microforms, 270,000 pamphlets, 250,000 black-and-white photographs, 50,000 color transparencies, 15,000 field record notebooks, and 250 videocassettes. Materials include USGS publications as well as those produced by state and foreign geological surveys, scientific societies, museums, academic institutions, and government scientific agencies.