Publication Type: | Journal Article |
Year of Publication: | 1920 |
Authors: | T. Wayland Vaughan |
Journal: | United States Geological Survey Professional Paper |
Volume: | 128 |
Pagination: | 61 - 66, pl. 10 |
Date Published: | 1920/// |
URL: | http://books.google.com/books?id=A0oRAAAAIAAJ |