Hughston, L P; Penrose, R; Sommers, P and Walker, M. 1972. On a Quadratic First Integral for the Charged Particle Orbits in the Charged Kerr Solution. Communications in Mathematical Physics, 27(4), pp. 303-308. ISSN 0010-3616 [Article]

Caplan, Pat. 1972. Priests and Cobblers: Social Change in a Hindu Village in Western Nepal. San Francisco: Chandler. ISBN 978-0810204546 [Book]

Hughston, L P. 1972. On an Einstein-Maxwell Field with a Null Source. In: D Farnsworth; J Fink; J Porter and A Thompson, eds. Methods of Local and Global Differential Geometry in General Relativity. 14 Berlin: Springer, pp. 121-125. ISBN 3540057935 [Book Section]