I.U.G.S./I.G.C.P. Precambrian—Cambrian Boundary Working Group in Normandy and Paris, 1974
- 1 March 1975
- journal article
- Published by Cambridge University Press (CUP) in Geological Magazine
- Vol. 112 (2), 197-198
- https://doi.org/10.1017/s001675680004588x