Das mittlere Pleistozän im Einzugsgebiet des Rheins paper prepared in advance for participants in Burg Wartenstein Symposium No. 58: Stratigraphy and patterns of cultural change in the middle Pleistocene ; July 2 - 11, 1973 - Brunnacker, Karl 1921-2000 (Wenner-Gren Foundation for Anthropological Research, 1973)