In vitro techniques : propagation and long term storage : propagation and long term storage : proceedings of a seminar in the CEC Program of Co-ordination of Research on Plant Productivity, held at Braunschweig, Federal Republic of Germany, 27-29 November, 1984 sponsored by Commission of the European Communities, Co-ordination of Agriculture Research edited by A. Schafer-Menuhr. - Schafer-Menuhr, (Advances in agricultural biotechnology, 1985)