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BB	Environmental interactions of clays / A. Parker, J.E. Rae (Eds.) Berlin [etc.] : Springer, 1998
BB	Low-grade metamorphism / [edited by] Martin Frey, Doug Robinson Oxford [etc.] : Blackwell Science, 1999
BB	Origin and mineralogy of clays : clays and the environment / B. Velde (ed.) Berlin ; London : Springer-Verlag, cop. 1995
BB	Velde, Bruce. Introduction to clay minerals : chemistry, origins, uses and environmental significace / B. Velde . - [1st ed.] London [etc.] : Chapman & Hall, 1992