Columbia subject headings:
Beli︠a︡nkin, D. S. (Dmitriĭ Stepanovich), 1876-1953.
Mineralogy.
Petrology.
Harvard subject headings:
Beli︠a︡nkin, D. S. (Dmitriĭ Stepanovich), 1876-1953.
Mineralogy
Petrology
Princeton subject headings: