2 literature references:

Author: Nelson, J.S., E.J. Crossman, H. Espinosa-PĂ©rez, L.T. Findley, C.R. Gilbert, R.N. Lea and J.D. Williams
Year: 2004
Title: Common and scientific names of fishes from the United States, Canada, and Mexico.
Source: American Fisheries Society, Special Publication 29, Bethesda, Maryland.
Author: Nakamura, I.
Year: 1985
Title: FAO Species Catalogue. Vol. 5. Billfishes of the world. An annotated and illustrated catalogue of marlins, sailfishes, spearfishes and swordfishes known to date.
Source: FAO Fish. Synop. 125(5):65 p.