General Interest Article
Proceedings of the Iowa Academy of Science
© Copyright 1949 by the Iowa Academy of Science, Inc.
"Proceedings of the Sixty-First Meeting of the Iowa Academy of Science Held at Drake University, Des Moines, Iowa, April 15 and 16, 1949: Minutes of the 1949 Meeting,"
Proceedings of the Iowa Academy of Science: Vol. 56:
, Article 3.
Available at: https://scholarworks.uni.edu/pias/vol56/iss1/3