Trade barriers to knowledge : a manual of regulations affecting educational, scientific and cultural materials
著者
書誌事項
Trade barriers to knowledge : a manual of regulations affecting educational, scientific and cultural materials
Unesco, 1955
New and rev. ed
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注記
"Prepared in the Division of Free Flow of Information, department of mass communication, Unesco. The information on tariff and trade regulations was compiled by the Intelligence Unit of The Economist, London."--T.p.
