1. Wüst, G., “Meteorwerk”, 4, 1.
2. Pinke, “Snellius” Reports, 2, Part 2, Chapter 1, Table 1, pp. 53–55 (Utrecht, 1935).
3. Wüst, G., Die Erde, 3–4, 213 (1950–51).
4. Hess, H. H., and Buell, jun., M. W., Trans. Amer. Geophys. Union, 31 (June 1950).
5. Murray, Sir John, and Hjort, J., “The Depths of the Oceans”, Map. 11, p. 129 (1912).