Die alten Zechen an der Ruhr
By: Wilhelm und Gertrude Hermann.
Contributors: Hermann, Gertrude.
Edition: [2. Aufl.].
Series: Die Blauen Bücher
Publisher: Langewiesche
Published: 1982
Place of publication: Königstein im Taunus
Language: ger
Number of pages: 133
Subjects: Coal mines and mining -- Germany -- Ruhr (Region)
Notes: Bibliography: p. 133.