The Great Lakes United collection includes published reports, programs, journals, newsletters, handbooks, fact sheets, pamphlets and video tapes obtained from the organization’s Buffalo, NY, offices. The information gathered in this collection covers issues relevant to both the United States and Canada on the topic of the Great Lakes ecosystem and its environment. The bulk of the collection highlights concerns from and regarding the United States, but there also exists a significant amount of material collected from Canada and the International Joint Commission. Significant topics covered within the materials are issues ranging from water quality reports and protection agendas to environmental awareness publications; the bulk of the collection consists of information regarding the Great Lakes’ total ecosystem. The data spans the approximate years from 1984 to 2004.