Columbia subject headings:
Harvard subject headings:
Gordon, George, 1801-1893--Congresses.
Natural history--Scotland--Moray--Congresses.
Princeton subject headings:
Dinosaurs--Scotland--Elginshire--Congresses.
Geology--Scotland--Elginshire--Congresses.
Gordon, George, 1801-1893--Congresses.
Natural history--Scotland--Elginshire--Congresses.
Natural history--Scotland--Moray--Congresses.
Paleontology--Scotland--Elginshire--History--Congresses.