Zullo, V. A., 1969, Thoracic Cirripedia of the San Diego Formation, San Diego County, California.

Zullo, V. A., 1969, Thoracic Cirripedia of the San Diego Formation, San Diego County, California., Contributions in Science of the Natural History Museum of Los Angeles County 159, pp. 1-25

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https://www.nhm.org/site/sites/default/files/pdf/contrib_science/CS159.pdf

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