@book{ 0-672569345, title = {Sahara: mineral resources, landscapes, people (Records of a Geologist); [with Photographic Atlas; Lithostratigraphic Map of the Sahara; Sahara: Most significant Mineral Resources; Geologic Time Table. Glossary of geologic and geographic terms used by the sharan natives.]}, author = {Ratschiller, Ludwig Karl}, address = {Lajen}, publisher = {Gruber}, year = {2003}, isbn = {9788886153140}, isbn = {8886153147}, language = {English}, url = {https://swbplus.bsz-bw.de/bsz352320419inh.htm}, url = {https://katalog.ub.tu-freiberg.de/Record/0-672569345} }