Subject ASC0003t8u
The geological magazine, or, Monthly journal of geology.
Decade 3:v.3 (1886), Page 23 (1886)
Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
BHL Page 32502536
Keywords
Fossil Dichograptus graptolite herrmann galgenberg shale phyllograptus christiania fossil rock dichograptus kjerulfi Graptolites Herrmann Phyllograptus shales Galgenberg Christiana