| Publication Type: | Journal Article |
| Year of Publication: | 1969 |
| Authors: | N. B. Causey, Tiemann D. L. |
| Journal: | Proceedings of the American Philosophical Society |
| Volume: | 113 |
| Pagination: | 14–33 |
| URL: | http://www.jstor.org/stable/10.2307/986014 |
| Citation Key: | 129 |
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