Through consortium loan or interlibrary loan, you can request books that Gelman Library does not hold
Consortium Loan Service
Submit requests for books and articles not owned by Gelman. Here is a detailed procedure on how to request books from a consortium library.
Interlibrary Loan (ILL) is a free service available to current GW students, faculty members and staff to obtain material not owned by any of the GW libraries or Washington Research Libraries Consortium (WRLC) libraries. You need to log in to use this service. Here is a step-by-step direction on how to request items through this service.
You can't find a book you need in WRLC catalog? There are ways to find which institutions in the U.S. and other countries have books, journals and articles you are looking for.