Não informado. Summary of operations, California oil fields. Department of Natural Resources, Division of Oil and Gas.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Summary of Operations, California Oil Fields. San Francisco, Calif: Department of Natural Resources, Division of Oil and Gas.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Summary of Operations, California Oil Fields. Department of Natural Resources, Division of Oil and Gas.
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