Columbia subject headings:
Green Lake (Green Lake County, Wis. : Lake)
Plankton--Wisconsin.
Winnebago, Lake (Wis.)
Harvard subject headings:
Freshwater plankton--Wisconsin.
Green Lake (Green Lake County, Wis. : Lake)
Green Lake (Wis.)
Plankton--Wisconsin--Green Lake.
Plankton--Wisconsin--Winnebago, Lake.
Plankton--Wisconsin.
Winnebago, Lake (Wis.)
Princeton subject headings: