Columbia subject headings:
Land use--Brandywine Creek Watershed (Pa. and Del.)
Regional planning--Brandywine Creek Watershed (Pa. and Del.)
Water resources development--Brandywine Creek Watershed (Pa. and Del.)
Harvard subject headings:
Land use--Brandywine Creek Watershed (Pa. and Del.)
Regional planning--Brandywine Creek Watershed (Pa. and Del.)
Water resources development--Brandywine Creek Watershed (Pa. and Del.)
Princeton subject headings:
Land use--Brandywine Creek Watershed (Pa. and Del.).
Regional planning--Brandywine Creek Watershed (Pa. and Del.).
Water resources development--Brandywine Creek Watershed (Pa. and Del.).