. . . "Alkali-Intrusiv-Komplex" . "The geology of younger intrusive alkali complexes in the southwestern Nuba mountains, Sudan : results of reconnaissance mapping" . . . . . . . . "The geology of younger intrusive alkali complexes in the Southwestern Nuba Mountains, Sudan : results of reconnaissance mapping" . . . . . . . . . . . "The geology of younger intrusive alkali complexes in the southwestern Nuba Mountains, Sudan : results of reconnaissance mapping" . . . . . . "Nubaberge Geographie, Geologie, Geodäsie, Klimatologie." . . "Intrusion." . . "Alkaligesteine." . . "Nubaberge." . . "Nubaberge" . "Alkaligestein." . . "From 190 to 230 million years ago" . . "Geologie." . . "Buntsandstein." . . . . "Tiefengestein." . . "Alkali-Kalkgesteine." . .