Anbulkan amo an usa nga garawasan ha bawbaw han usa ka planeta nga nagpapagawas han nagkakaladkad, tunaw nga bato, abo, ngan aso tikang ha ubos han tuna.
Sigurðsson, Haraldur, ed. (1999).Encyclopedia of Volcanoes. Academic Press.ISBN 0-12-643140-X. This is a reference aimed at geologists, but many articles are accessible to non-professionals.
