Suppl. to "Bibliographical services throughout the world, 1970-1974", pub., Paris, 1977
Suppl. to "Bibliographical services throughout the world, 1970-1974", pub., Paris, 1977
Suppl. to "Bibliographical services throughout the world, 1975-1979", pub. Paris, UNESCO, 1984
Suppl. to "Bibliographical services throughout the world, 1975-1979", pub. Paris, UNESCO, 1984
Suppl. to "Bibliographical services throughout the world, 1975-1979", pub. Paris, UNESCO, 1984
Suppl. to "Bibliographical services throughout the world, 1975-1979", pub. Paris, UNESCO, 1984
Incl. suppl.
Incl. suppl.