Columbia subject headings:
Lake sediments.
Paleoclimatology--Holocene.
Peat bogs.
Stable isotopes.
Tree-rings.
Harvard subject headings:
Lake sediments--Congresses.
Paleoclimatology--Holocene--Congresses.
Peat bogs--Congresses.
Stable isotopes--Congresses.
Tree-rings--Congresses.
Princeton subject headings:
Dendrochronology.
Lake sediments.
Paleoclimatology--Holocene.
Peat bogs.
Stable isotopes.