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Momotombo,
Nicaragua, Smithsonian
Key:
Active
volcanoes / Aktive vulkaner: Jorgen S. Aabech,
"JAS"
Global Volcanism Program, Smithsonian,
"SI"
Hawai`i Institute of Geophysics and
Planetology,
"HI"
Keweenaw
Volcano Observatory, Michigan Tech "KVO"
Project
Discussions,
"Herrick"
Volcanoes and Volcanics - USGS
"VDAP"
Volcanes de Nicaragua, INETER, "IN"
Volcanoes.CA
: Glyn Williams-Jones, "VOA"
Volcano
Space: University of Miami, "VS"
Volcano
World: U. of North Dakota, "VW"
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