Survey of existing legal deposit laws : International Congress on National Bibliographies, Paris, 12-15 September 1977 /
Pomassl, Gerhard.
Unesco.
International Congress on National Bibliographies.
Paris : Unesco,
1977.
At head of title: United Nations Educational, Scientific and Cultural Organization.
"CC-77/CONF.401/COL.2."
Legal deposit of books, etc.