Columbia subject headings:
Paleoecology--Congresses.
Sedimentary structures--Congresses.
Trace fossils--Congresses.
Harvard subject headings:
Paleoecology--California--Guidebooks.
Sedimentary structures--California--Guidebooks.
Trace fossils--California--Guidebooks.
Princeton subject headings:
Paleoecology--Congresses.
Sedimentary structures--Congresses.
Trace fossils--Congresses.