TY - ART TI - Some conservation problems of the Great Lakes; [address given at the joint technical program of the American Geophysical Union and the American Meteorological Society in a Symposium on the Natural Setting and Engineering Problems of the Great Lakes, Del Prado Hotel, Chicago, Illinois, September 11, 1952] / Biological notes — Illustration, BHL page 14984416 PY - 1953 UR - https://www.biodiversitylibrary.org/page/14984416 ID - page-14984416 ER -