Columbia subject headings:
Paleobotany--Technique.
Palynology.
Plant spores, Fossil.
Plants, Fossil.
Harvard subject headings:
Paleobotany--Methodology.
Plant spores, Fossil--Collection and preservation.
Plant spores, Fossil.
Plants, Fossil--Collection and preservation.
Plants, Fossil.
Pollen, Fossil--Collection and preservation.
Pollen, Fossil.
Princeton subject headings:
Paleobotany--Methodology.
Plant spores, Fossil--Collection and preservation.
Plant spores, Fossil.
Plants, Fossil--Collection and preservation.
Plants, Fossil.
Pollen, Fossil--Collection and preservation.
Pollen, Fossil.