Claßen, Erich

• Petrological characterisation of the “Tertiary quartzites” from the site of Troisdorf-Ravensberg (North Rhine-Westphalia, Germany): first insights in Middle Palaeolithic outcrop exploitation
  Quartär – Internationales Jahrbuch zur Erforschung des Eiszeitalters und der Steinzeit Vol. 66 (2019): Quartär. International Yearbook for Ice Age and Stone Age Research