National Geographic Society Cartographic Division. (1995). Heart of the rockies. Washington, D.C.: National Geographic Society.
Citación estilo ChicagoNational Geographic Society Cartographic Division. Heart of the Rockies. Washington, D.C.: National Geographic Society, 1995.
Cita MLANational Geographic Society Cartographic Division. Heart of the Rockies. Washington, D.C.: National Geographic Society, 1995.
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