Nikolai Petrovich Likhachev, (1862-1936) : scholar and pioneer Russian codicologist and student of watermarks /
Simmons, John Simon Gabriel.
Oxford : [J.S.G. Simmons?],
1994.
Likhachev, N. P. (Nikolaĭ Petrovich), 1862-1936.
Auxiliary sciences of history.