(List of the Letters and Manuscripts of Musicians in the Clark Library; Inventory of the Bixby Records Collection in the Palos Verdes Library and Art Gallery; Identification of the Persons Mentioned in the Bixby Records Collection; Supplement to the Manual of Procedure: American Imprints Inventory, the Southern California Historical Records Survey, 1941; The Care and Cataloguing of Manuscripts, Key to the Manuscripts Collection in the Huntington Library)