Columbia subject headings:
Harvard subject headings:
Conservation of natural resources--Panama--Panama Canal Watershed.
Ecological surveys--Panama--Panama Canal Watershed.
Hydrographic surveying--Panama--Panama Canal Watershed.
Natural history--Panama--Panama Canal Watershed.
Natural resources--Panama--Panama Canal Watershed.
Panama Canal Watershed (Panama)
Panama, Bay of (Panama)
Watershed management--Panama--Panama Canal.
Princeton subject headings:
Ecological surveys--Panama Canal (Panama).
Hydrographic surveying--Panama Canal (Panama).
Panama Canal Watershed (Panama)
Watershed management--Panama Canal (Panama).