| 1st Author: | Wulff, Rudolf   | 
| 2nd Author: |  | 
| 3rd Author: |  | 
| Year: | 1923 | 
| Title: | Das Famennien der Aachener Gegend. | 
| Reference: | Jahrbuch der Preußischen Geologischen Landesanstalt, 43 (for 1923): 1-70, fig.1-26, pl.1-2; Berlin. | 
| Keywords: | Famennian; Germany; Aachen | 
| Link: |  |