Columbia subject headings:
Harvard subject headings:
Fersman, A. E. (Aleksandr Evgenʹevich), 1883-1945.
Timiri︠a︡zev, K. A. (Kliment Arkadʹevich), 1843-1920
Princeton subject headings:
Fersman, A. E. (Aleksandr Evgenʹevich), 1883-1945.
Timiri︠a︡zev, K. A. (Kliment Arkadʹevich), 1843-1920.