Pocket Essentials. p. 141. ISBN 1-903047-50-1. Hadden, R.L. (2008). "The Heringen Collection of the US Geological Survey Library, Reston, Virginia". Earth...
79 KB (8,514 words) - 04:14, 27 August 2024
used in underground mining from the 400-metre level on down on the Werra (Heringen, Philippsthal) and on the Fulda (Neuhof bei Fulda), yielding potash. Today's...
50 KB (6,221 words) - 13:22, 22 April 2024