Center for Health Statistics, California Department of Health Services, Sacramento, California. California Birth Index 1905–1995. State of California. [2010-02-17]. (原始内容存档于2013-11-01).
Center for Health Statistics, California Department of Health Services, Sacramento, California. California Birth Index 1905–1995. State of California. [2010-02-17]. (原始内容存档于2013-11-01).