Columbia subject headings:
Lavrov, P. L. (Petr Lavrovich), 1823-1900.
Socialists--Soviet Union--Biography.
Harvard subject headings:
Lavrov, P. L. (Petr Lavrovich), 1823-1900
Socialists--Soviet Union--Biography
Princeton subject headings:
Lavrov, P. L. (Petr Lavrovich), 1823-1900.
Socialists--Soviet Union--Biography.