Industrial crystallization 78 : proceedings of the 7th Symposium on Industrial Crystallization, Warsaw, Poland, 25-27 September 1978 - Jong, E. J. de (Esso J.), 1924-; Jančić, S. J., 1943- (North-Holland Pub. Co. ; distributors for the U.S.A. and Canada, Elsevier/North-Holland, 1979)