Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleQuantitative Seasonal Changes in the Phytoplankton Communities of Pymatuning Reservoir.AuthorsHartman, Richard T.; Graffius, J. HerbertPublicationEcology, 1960, Vol 41, Issue 2, p333ISSN0012-9658Publication typeArticleDOI10.2307/1930224