Guide book development 0f soil minerals in relation to parent material and environmental conditions in the Black Forest and Upper Rhine Graben, Southwest Germany ; Strasbourg, France, August 28 . Septembre 2, 1989 ; Pre Congress Field Trip A - Hädrich, Friedhelm 1934-; Maus, Hansjosef 1936-2001; Papenfuß, K. H.; Schwertmann, Udo 1927-2016; Stanjek, Hubert 1904- (AIPEA, 1989)