3
by Sak, Petr, 1945-
Published 1999
Thesis Manuscript
4
by Sak, Petr, 1945-
Published 1985
Book
15
by Lensu, Michail Jakovlevič
Published 1986
Other Authors: '; ...Sak, Petr, 1945-...
Book
16
Published 1997
Other Authors: '; ...Sak, Petr, 1945-...
Book