In addition to books, the library holds some 2.7 million audio and video recordings, 12 million photographs, 4.8 million maps, and 57 million manuscripts.
Selain buku - buku, perpustakaan itu memiliki kira - kira 2,7 juta rekaman suara dan video, 12 juta foto, 4,8 juta peta, dan 57 juta manuskrip.