Published in 2 separate volumes.With 2 separate tabs., 232 figs., 29 tabs. in text volume, 220 figs. in separate volumeAvailable from Geologisches Landesamt Nordrhein-Westfalen, Krefeld (Germany) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman