| Publication Type: | Journal Article |
| Year of Publication: | 1930 |
| Authors: | R. B. Stewart |
| Journal: | Academy of Natural Sciences Special Publication |
| Volume: | 3 |
| Pagination: | 1-314, pls. 1-17 |
| Publication Type: | Journal Article |
| Year of Publication: | 1930 |
| Authors: | R. B. Stewart |
| Journal: | Academy of Natural Sciences Special Publication |
| Volume: | 3 |
| Pagination: | 1-314, pls. 1-17 |