National Geographic (1999) — El Niño/La Niña: Nature's Vicious Cycle (Vol. 195, No. 3, March 1999): March 1999 issue By National Geographic Society

National Geographic magazine, Vol. 195, No. 3 (March 1999). Cover feature: “El Niño / La Niña — Nature’s Vicious Cycle.” Other cover-listed articles: Heart of the Sahara; Photographing the Sahara from Aloft; North Florida Springs; Steller’s Sea-Eagles; Ten Years After Exxon Valdez; Unmasking the Snapping Turtle.