Chronostratigraphic definition of the Precambrian–Cambrian boundary.

Autor: Cowie, J. W., Bassett, M. G., Fritz, W. H., Harland, W. B., Menner, V. V., Palmer, A. R., Rozanov, A. Yu., Semikhatov, M. A., Sokolov, B. S.
Zdroj: Geological Magazine; Nov1984, Vol. 121 Issue 6, p649-649, 1p
Databáze: Complementary Index