How does the Library acquire its holdings?
Through exchange with libraries in this country and abroad, gifts, materials received from local, state and federal agencies as well as foreign governments, purchase, and copyright deposits. Materials are added to the collections of the Library at a rate of 10,000 items per working day. Selection officers review materials and decide which should be kept and added to the permanent collections. Copyright deposits make up the core of the collections, particularly those in the map, music, motion picture, and prints and photographs divisions.