Noticias de California. First Report of the Occupation by the Portola Expedition, 1770...a New Trans., Contemporary Maps, and a Narrative of how it All Came to Pass, by George Peter Hammond
Expedition into New Mexico made by Antonio de Espejo, 1582-1583, as revealed in the journal of Diego Pérez de Luxán, a member of the party. Translated, with introduction and notes, by George Peter Hammond ... and Agapito Rey. (Republished.).
Digging for Gold Without a Shovel. The Letters of Daniel Wadsworth Coit from Mexico to San Francisco 1848-1851. Edited, with an Introduction by George P. Hammond
A Guide to the Manuscript Collections of the Bancroft Library. Edited by Dale L. Morgan and George P. Hammond
Coronado Cuarto Centennial Publications, 1540-1940. Edited by George P. Hammond. (Coronado Historical Series.).