Note on the occurrence of in CaliforniaDOI: info:10.5479/si.00963801.3-113.46v. 3No. 11346–47, 1 pl.
White, C. A. 1880. "Note on the occurrence of Productus giganteus in California." Proceedings of the United States National Museum, 3, (113) 46–47, 1 pl.. https://doi.org/10.5479/si.00963801.3-113.46.