H. M. Prichard, P. J. Potts, J. F. W. Bowles and S. J. Cribbs. Geo-Platinum 87. London and New York (Elsevier Science), 1988. xiii + 422 pp. Price £70.00

D. Polya
1989 Mineralogical magazine  
doi:10.1180/minmag.1989.053.372.18 fatcat:v3lqkt5ngnewdberh6ltslnppa