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  1. The abundance, distribution, and biology of plankton in Lake Michigan : with the addition of a Research Ships of Opportunity Project /
    By: Robertson, Andrew, - United States. Office of Naval Research - University of Michigan. Great Lakes Research Division.
    Publication info: Ann Arbor, Mich. :University of Michigan, Great Lakes Research Division,1968.
    Holding Institution: University of Michigan (archive.org)
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