Hekla (Czech Wikipedia)

Analysis of information sources in references of the Wikipedia article "Hekla" in Czech language version.

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archive.org

SIGURDSSON, Haraldur; DAVIDSON, Jon; DE SILVA, Shan. Encyclopedia of Volcanoes. [s.l.]: Academic Press, 1999. Dostupné online. ISBN 978-0-12-643140-7. Kapitola Composite Volcanoes, s. 664-665. (anglicky)