Reference | Espenshade, G. H. And Potter, D. B., 1960, Kyanite, Sillimanite, And Andalusite Deposits Of The Southeastern States: U.S. Geol. Survey Prof. Paper 336.Espenshade, G. H. And Potter, D. B., 1960, Kyanite, Sillimanite, And Andalusite Deposits Of The Southeastern States: U.S. Geol. Survey Prof. Paper 336. |