enciklopēdiju redakcija. 1978. 317-318. lpp. Islands and Protected Areas of the GulfofCalifornia Vikikrātuvē par šo tēmu ir pieejami multivides faili. Skatīt:
Aurioles-Gamboa, D. (2003). "Breeding season of the California sea lion (Zalophus californianus) in the GulfofCalifornia, Mexico". Aquatic Mammals. 29 (10):
Golden Gate—Oceanography, Geology, Biology, and Environmental Issues in the Gulfof the Farallones David A. Demer & Stéphane G. Conti (2005). "New target-strength
L. D. (1999). "Increase in Extralimital Occurrences of Ice-Breeding Seals in the Northern Gulfof Maine Region: More Seals or Fewer Fish?". Marine Mammal
Spokesman, 2012. 23. - 30. lpp. ISBN 9780851248028 Martel E. Gulfof Tonkin OAH Magazine of History. Volume 7. Number 2. 1992. gada rudens. 36. lpp. Skatīts: