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Productivity of phytoplankton and quantities of zooplankton and bottom fauna in relation to water quality of Lake Ashtabula Reservoir, North Dakota
Productivity of phytoplankton and quantities of zooplankton and bottom fauna in relation to water quality of Lake Ashtabula Reservoir, North Dakota
By John J. Peterka
Lake Ashtabula walleye tagging project
Lake Ashtabula walleye tagging project
By Lynn R. Schlueter