Columbia subject headings:
Geologists--Ukraine--Diaries.
Vernadskiĭ, V. I. (Vladimir Ivanovich), 1863-1945--Diaries.
Harvard subject headings:
Geologists--Ukraine--Diaries.
Vernadskiĭ, V. I. (Vladimir Ivanovich), 1863-1945--Diaries.
Princeton subject headings:
Vernadskiĭ, V. I. (Vladimir Ivanovich), 1863-1945.