1. volcanology.press/Klyuchevskaya_Sopka/Klyuchevskaya_Sopka_knl.php

    Kilauea; Mount Etna; Mount Yasur; Mount Nyiragongo and Nyamuragira; Piton de la Fournaise; Erta Ale

  2. www.steamindex.com/backtrak/bt28.htm

    Backtrack magazine:illustrated journal about railway and locomotive history