The Clay Minerals Society, National conference on Clays and clay minerals, & Bradley, W. (1966). Clays and clay minerals: Proceedings of the thirteenth national conference on Clays and clay minerals : Oct., 5-8,1964. Pergamon Press.

The Clay Minerals Society, National conference on Clays and clay minerals, and W.F Bradley. Clays and Clay Minerals: Proceedings of the Thirteenth National Conference on Clays and Clay Minerals : Oct., 5-8,1964. Oxford: Pergamon Press, 1966.

The Clay Minerals Society, et al. Clays and Clay Minerals: Proceedings of the Thirteenth National Conference on Clays and Clay Minerals : Oct., 5-8,1964. Pergamon Press, 1966.