Columbia subject headings:
Dissertations, Academic--Estonia--Bibliography.
Easti NSV Teaduste Akadeemia. Teaduslik Qaamatukagu--Dissertations--Bibliography.
Harvard subject headings:
Dissertations, Academic--Estonia--Bibliography.
Easti NSV Teaduste Akadeemia. Teaduslik Qaamatukagu--Dissertations--Bibliography.
Princeton subject headings: