1. Berg, K., Acta Path. Microbiol. Scand., 59, 369 (1963).
2. Mohr, J., and Berg, K., Acta Genet. (Basel), 13, 343 (1963).
3. Berg, K., and Wendt, G. G., Humangenetik, 1, 24 (1964).
4. Ropartz, C., Nature, 189, 586 (1961).
5. Steinberg, A. G., in Progress in Medical Genetics, 2 (Grune and Stratton, London and New York, 1962).