Kloprogge, J. T. & Frost, R. L.: A Raman microscopic study of tungstate and
molybdate minerals: scheelite, wolframite and wulfenite. With 9
figures and 3 tables 193-211
de Bruiyn, H., Schoch, A. E., van der Westhuizen, W. A. & Beukes, G. J.: The
chemical composition of xonotlite and associated inesite from the Nchwaning
and Wessels mines, Kalahari manganese field, South Africa. With 2 figures and
4 tables 212-222
Wang, N.: An experimental study of some solid solutions in the system
Ag2S-PbS-Bi2S3 at low temperatures. With 6 figures 223-240