Paleographic value of paper watermarks

Likhachev, Nikolai Petrovich (1862-1935).Paleographic importance of paper watermarks: lectures, recorded by the listeners of the St. PetersburgSkago Archaeological Institute in 1899-1900 Acad.year / N. P. Likhachev.- St. Petersburg: type-lithogr.I. Yudelevich, ed.Listener A. Korotaeva, [1900].- [2], 60 s.;29 cm - -Selo.1 kN.Inc.on write.Mash.Lithogr..Electronic copy source: RGB