| author | date | title | journal / publication | Eddy MW, Gleim DI | 1932 | A Thermotropic Gradient Apparatus with Some Preliminary Studies on Planaria Phagocata gracilis Haldemann, Newt Triturus viridescens Rafinesque and Earthworm Lumbricus terrestris Linnaeus. | Proceedings of the Pennsylvania Academy of Science, 6: 27-32 |
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