Books - General

Harker, Alfred (1909). The Natural History of Igneous Rocks. London: Methuen, 1st edition.  xvi + 384pp. Hardback, Rebacked,. Methuen.

Bullard, F.M. (1962). Volcanoes: in History, in Theory, in Eruption. Austin, University of Texas Press, 1st edition, 441 pp, Hardback,. University of Texas Press.

Newall, G. and Rast, N. (eds) (1970). Mechanism of Igneous Intrusion. Liverpool: Gallery Press,  1st edition,. Liverpool Gallery Press.