Mineralogy towards the twenty-first century : a discussion organized jointly for the Royal Society and the Mineralogical Society by J. E. T. Horne and Sir Kingsley Dunham, For. Sec. R.S., in celebration of the Mineralogical Society's centenary meeting held on 7 and 8 April 1976. - Horne, John Ewen Troup; Durham, Kingsley Charles Sir 1910- (Royal Society, 1977)