Nuclear Research Foundation Summer Science School for High-School Students University of Sydney, Nuclear Research Foundation within the University of Sydney, Butler, S. T., & Messel, H. (1965). Time: Selected lectures on time and relativity, the arrow of time and relation of geological and biological time, and on men of science. Pergamon Press.

Nuclear Research Foundation Summer Science School for High-School Students University of Sydney, Nuclear Research Foundation within the University of Sydney, S. T. Butler, and H. Messel. Time: Selected Lectures on Time and Relativity, the Arrow of Time and Relation of Geological and Biological Time, and on Men of Science. Oxford, New York: Pergamon Press, 1965.

Nuclear Research Foundation Summer Science School for High-School Students University of Sydney, et al. Time: Selected Lectures on Time and Relativity, the Arrow of Time and Relation of Geological and Biological Time, and on Men of Science. Pergamon Press, 1965.