R. von Steiger, G. Gloeckler, G.M. Mason (2007). The Composition of Matter: Symposium honouring Johannes Geiss on the occasion of his 80th birthday (p. 162)
David Harland (2011). Apollo 12: On the Ocean of Storms (pp. 251-253)
R. von Steiger, G. Gloeckler, G.M. Mason (2007). The Composition of Matter: Symposium honouring Johannes Geiss on the occasion of his 80th birthday (p. 162)