The Klauber Library, the personal herpetological library of L. M. Klauber, was donated to the San Diego Natural History Museum in 1967. This extraordinary collection of approximately 2000 titles relating to the study of herpetology is available to visiting researchers by appointment only. In addition to standard and hard-to-find reference works and journals on herpetology and related topics, the Klauber Library, in keeping with Mr. Klauber's interests as a bibliophile, includes many extremely rare and beautiful volumes on natural history, such as works from the 16th and 17th centuries. The collection also houses the extensive field notes and papers of L. M. Klauber, as well as his personal research diaries. This library represents one of the most complete collections of herpetological material in southern California.