Stevens, John K. A fish with double vision : Native to the Galápagos Islands, this animal has a most unusual optical system / John K. Stevens and Katharine E. Parsons. - 1980. - 62-67 p. BIB Now: 6609 Inglés Subjects--Index Terms: Fishes Peces Optical system Sistema óptico Galápagos Dewey Class. No.: 597.77