G. Mercalli. I vulcani attivi della terre. Hoepli, Milan, 1907, pp. 421. (A most valuable work, beautifully illustrated, but in the Italian language.)
Arrangement of volcanic vents:—
Th. Thoroddsen. Die Bruchlinien und ihre Beziehungen zu den Vulkanen, Pet. Mitt., vol. 51, 1905, pp. 1-5, pl. 5.
R. D. M. Verbeek. Various volumes and atlases of maps covering the Dutch East Indies and fully cited in the following reference (p. 21).
William H. Hobbs. The Evolution and the Outlook of Seismic Geology, Proc. Am. Phil. Soc., vol. 48, 1909, pp. 17-27.
Birth of volcanoes:—
F. Omori. The Usu-san Eruption and Earthquake and Elevation Phenomena, Bull. Earthq. Inv. Com., Japan, vol. 5, No. 1, 1911, pp. 1-37, pls. 1-13.
Fissure eruptions:—
Th. Thoroddsen. Island, IV, Vulkane, Pet. Mitt., Ergänzungsh. 153, 1906, pp. 108-111.
A. Geikie. Text-book of Geology, 4th ed., pp. 342-346.