A revision of the hammerhead sharks (family Sphyrnidae)
Gilbert, C.R. (1967). A revision of the hammerhead sharks (family Sphyrnidae). Proceedings of the United States National Museum, 119(3539). Smithsonian Institution: Washington. 88 pp.
Part of: Proceedings of the United States National Museum. Smithsonian Institution Press: Washington,. ISSN 0096-3801