1. Alpert, D. and R. S. Buritz: 1954,’Ultra-High Vacuum. II. Limiting Factors on the Attainment of Very Low Pressures’, Journal of Applied Physics 25, 202–209.
2. Barnes, B.: 1982, T. S. Kuhn and Social Science, Macmillan, London and Basingstoke.
3. Behrensmeyer, A. K.: 1970,’Preliminary Geological Interpretation of a New Hominid Site in the Lake Rudolf Basin’, Nature 226, 225–226.
4. Behrensmeyer, A. K.: 1978, ’Correlations of Plio-Pleistocene Sequences in the Northern Lake Turkana Basin: A Summary of Evidence and Issues’, in W. W. Bishop (ed.), Geological Background to Fossil Man: Recent Research in the Gregory Rift Valley, East Africa, Scottish Academic Press, Edinburgh and University of Toronto Press, Toronto, pp. 421–440.
5. Bence, A. E. and A. L. Albee: 1968,’Empirical Correction Factors for the Electron Microanalysis of Silicates and Oxides’, Journal of Geology 76, 382–403.