All of our materials are located in closed stacks within our facility. Thus, you cannot browse materials and must request them by call number. Center staff will locate material for you. This usually takes less than ten minutes. You may request materials in advance of your visit or at the time of your arrival. Once materials are retrieved and given to you they are used exclusively in our Reading Room, meaning they do not leave for any reason. We ask that you complete a Patron Sign-In and Log Sheet and leave your photo ID with the Reference Specialist before using your requested materials. You will generally be allowed to have up to four items at a time with you in the Reading Room.