Columbia subject headings:
Harvard subject headings:
Astronomical observatories--Russia (Federation)--History--Sources.
Glavnai︠a︡ astronomicheskai︠a︡ observatorii︠a︡ (Pulkovo, Russia)
Princeton subject headings:
Astronomical observatories--Russia (Federation)--History--Sources.
Glavnai︠a︡ astronomicheskai︠a︡ observatorii︠a︡ (Pulkovo, Russia)--History--Sources.