Crystal growth 1983 : proceedings of the seventh International Conference on Crystal Growth, Stuttgart, FED. REP. of Germany , 12-16, September 1983 /edited by W. Tolksdorf - International Conference on Crystal Growth; Tolksdorf, W.; Irvine, S. J. C.; Mullin, J. B.; Peiser, H. Steffen (Herbert Steffen) (Journal of crystal growth, 1983)