المؤلفون: Hay, R. L., Guldman, S. G., Matthews, J. C., Lander, R. H., Duffin, M. E., Kyser, T. K.

المصدر: Clays and Clay Minerals ; volume 39, issue 1, page 84-96 ; ISSN 0009-8604 1552-8367

الاتاحة: http://dx.doi.org/10.1346/ccmn.1991.0390111
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0009860400017213