1. F. Geiss, Chromatographia3, 403 (1970).
2. R. E. Kaiser, Chromatography Conference Eindhoven, January 1975, unpublished.
3. IfC courses: High Pressure Liquid Chromatography October, 1974. Non commercial separation column prepared byF. Eisenbeiss, Darmstadt.
4. High Performance Thin-Layer Chromatography, IfC training course, June 1975.
5. G. Schomburg, IfC-course on Capillary Chromatography, April 1974.