Columbia subject headings:
Electrical engineers--Russia--Catalogs.
Golubit︠s︡kiĭ, P. M. (Pavel Mikhaĭlovich), 1845-1911--Catalogs.
Inventors--Russia--Catalogs.
Telephone--Russia--History.
Harvard subject headings:
Princeton subject headings:
Catalogs.
Electrical engineers--Russia--Catalogs.
Golubit︠s︡kiĭ, P. M. (Pavel Mikhaĭlovich), 1845-1911--Catalogs.
Inventors--Russia--Catalogs.
Telephone--Russia--History.