Não informado. Summary of operations, California oil fields. Department of Natural Resources, Division of Oil and Gas.
Chicago-referens (17:e uppl.)Não informado. Summary of Operations, California Oil Fields. San Francisco, Calif: Department of Natural Resources, Division of Oil and Gas.
MLA-referens (8:e uppl.)Não informado. Summary of Operations, California Oil Fields. Department of Natural Resources, Division of Oil and Gas.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.