Cocks, L. R. M.; Brunton, C. H. C.; Rowell, A. J.; Rust. I. C. (1970). The first Lower Palaeozoic fauna proved from South Africa. Quarterly Journal of the Geological Society of London. 125: 583-603.
486722
Cocks, L. R. M.; Brunton, C. H. C.; Rowell, A. J.; Rust. I. C.
1970
The first Lower Palaeozoic fauna proved from South Africa
Quarterly Journal of the Geological Society of London