1. Qualman Darrin (2017). https://www.darrinqualman.com/global-production-transistors/ Data is from 2015 and shows the enormous increase in transistor production per capita since 1955.
2. Bragg, W. H. & Bragg, W. L. (1913), The structure of the diamond. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 89: 277. W.H. Bragg was Cavendish Professor of Physics at the University of Leeds, W.L. Bragg had finished his BA and was at Trinity College, Cambridge. The diamonds used in the study were lent to the Braggs by the Mineralogical Laboratory at Cambridge. They used the recently developed technique of X-ray diffraction to solve the crystal structure.
3. Thomson, Thomas (1817). A System of Chemistry in Four Volumes, (5th edition. 1, 252). London: Baldwin, Cradock, and Joy.
4. Davis, J. G. (2014). St. Peter sandstone mineral resource evaluation, Missouri, USA, in: Proceedings of the 48th Annual Forum on the Geology of Industrial Minerals, Phoenix, Arizona, April 30—May 4, 2012. Arizona Geological Survey Special Paper #9, Chapter 6, p. 1–7. The proceedings editor was F.M. Conway.
5. Fancher, R. W., Watkins, C. M., Norton, M. G., Bahr, D. F., & Osborne, E. W. (2001). Grain growth and mechanical properties in bulk polycrystalline silicon. Journal of Materials Science, 36, 5441–5446.