| Publication Type: | Journal Article |
| Year of Publication: | 1931 |
| Authors: | N. C. Davis |
| Journal: | American Journal of Hygiene |
| Volume: | 13 |
| Issue: | 1 |
| Pagination: | 345–348, 2 pl. |
| DOI: | 10.1093/oxfordjournals.aje.a117122 |
| Full Text |
| Publication Type: | Journal Article |
| Year of Publication: | 1931 |
| Authors: | N. C. Davis |
| Journal: | American Journal of Hygiene |
| Volume: | 13 |
| Issue: | 1 |
| Pagination: | 345–348, 2 pl. |
| DOI: | 10.1093/oxfordjournals.aje.a117122 |
| Full Text |