Columbia subject headings:
Dendrochronology--Colorado River Watershed (Colo.-Mexico)
Hydrology--Colorado River Watershed (Colo.-Mexico)
Paleoclimatology--Colorado River Watershed (Colo.-Mexico)
Harvard subject headings:
Dendrochronology--Colorado River Watershed (Colo.-Mexico)
Hydrology--Colorado River Watershed (Colo.-Mexico)
Paleoclimatology--Colorado River Watershed (Colo.-Mexico)
Rain and rainfall--Colorado Valley.
Runoff.
Tree-rings.
Princeton subject headings: