Columbia subject headings:
Harvard subject headings:
Estuarine biology--New Hampshire.
Freshwater biology--Androscoggin River Watershed (N.H. and Me.)
Freshwater biology--Saco River Watershed (N.H. and Me.)
Princeton subject headings:
Estuarine biology--New Hampshire.
Freshwater biology--Androscoggin River Watershed (N.H. and Me.).
Freshwater biology--Saco River Watershed (N.H. and Me.).