The UNLV Libraries use Library of Congress call numbers. All call numbers begin with a letter, and for music, they are as follows:
Before digitization, copies of rare books or manuscripts could be shared among libraries by photographing the pages and reducing the images to tiny transparencies that can be viewed on a special reader. There are two microform readers in Lied Library on the second floor behind the grad commons and one on the first floor. Each machine has a binder with instructions, or ask for help at the computer help desk.