Kukuk P. Geologie des niederrheinsch-westfalischen steinkohlengebietes. In Russian (ask us if in doubt)/Kukuk P. Geologie des niederrheinsch-westfalischen steinkohlengebietes (Geologiya kamennougolnogo regiona nizhnego Reyna-Vestfalii).Berlin 1938, 706, S.Pb.and attachment. A beautifully made book on geology in German from the Third Reich.. SKUalbbddd17be149def53.