Gaya APA
Bulletin of the Global Volcanism Network Volume 15, No. 2, February 28, 1990. ().
Washington:
Smithsonian National Museum of Natural History.
Gaya MLA
Bulletin of the Global Volcanism Network Volume 15, No. 2, February 28, 1990.
.
Washington:
Smithsonian National Museum of Natural History,
.
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