1. Basset, A. B.: Preliminary Report No. 7, Reference Clay Minerals, A. P. I. Res. Project49, 59?61 (1950).
2. Boswell, P. G. H.: The contribution of clay m neralogy to the study of the diagenesis of sediments. Clay Minerals Bull.8, 246?251 (1952).
3. Brindley, G. W.: X-ray identification and_ crystal structures.of clay minerals.. Miner. Soc. 1951. Dort weitere Literatur.
4. Brinkmann, R.: Die Toneisensteine des Rhat-Lias. Arch. Lagerstattenforsch.75, 111?112 (1942).
5. Bubnoff, S. v.: Geologie von Europa. Bd. II, Teil 2. Berlin: Borntrager 1935.