| Publication Type: | Journal Article |
| Year of Publication: | 1908 |
| Authors: | A. H. Clark |
| Journal: | Proceedings of the Biological Society of Washington |
| Volume: | 21 |
| Pagination: | 125–136 |
| URL: | http://www.biodiversitylibrary.org/page/3334060 |
| Publication Type: | Journal Article |
| Year of Publication: | 1908 |
| Authors: | A. H. Clark |
| Journal: | Proceedings of the Biological Society of Washington |
| Volume: | 21 |
| Pagination: | 125–136 |
| URL: | http://www.biodiversitylibrary.org/page/3334060 |