Composition (1) Maps (1) Maps (1) Mark, German (1) Restrooms (1) Salt lakes (1) Sodium sulfate (1) Witnesses (1) Water (1) Toilets (1) Technical literature (1) Respect (1) Reason (1) Quartz (1) Pyrites (1) Production (Economic theory) (1) Paleohydrology (1) North (The word) (1) Nature (1) Mixing (1) Mineralogy (1) Lakes (1) Hydrology (1) Gypsum (1) Grain (1) Geology, Stratigraphic (1) Feldspar (1) Communication of technical information (1) Communication in science (1) Clay minerals (1)