Occasional Papers of the Museum of Zoology, University of Michigan . Nos. 1-35, 1913- 17 (each separately paged). Ann Arbor, published by the University.
- 28 December 1917
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 46 (1200) , 643
- https://doi.org/10.1126/science.46.1200.643-a