Columbia subject headings:
Geology--Kansas--Periodicals--Congresses.
Geology--Periodicals--Congresses.
Geology--United States--Periodicals--Congresses.
Harvard subject headings:
Geology--Congresses
Geology--Kansas--Congresses.
Geology--United States--Congresses.
Princeton subject headings:
Geology--Guidebooks.
Geology--Kansas--Periodicals.
Geology--United States--Periodicals.
Guidebooks.