The term interlibrary loan encompasses both borrowing and lending, both the sending of materials and the providing of reproductions. The purpose of interlibrary loan is to borrow or obtain copies of library materials not found in the San Diego Public Library system on behalf of the Library's patrons, and to lend or provide copies of library materials requested by other libraries. The basic premise for interlibrary loan is that no library can be completely self-sufficient in meeting the needs of its patrons.
Interlibrary loan is essential to the vitality of libraries of all types and sizes.
It is an important element in the provision of library service. Materials that may be borrowed include specific items that are not in the San Diego Public Library collection. Most libraries will not lend recent publications in heavy demand, reference material, or particularly valuable or fragile material. Limitations, in general, are those of the American Library Association Interlibrary Loan Code. Procedures and fees Any adult registered borrower with a valid San Diego Public Library card can arrange an interlibrary loan.