International exchange agreements potentially serve to facilitate the free access to official materials from abroad, similar to depository programs for national official publications collections and with corresponding issues of collecting and archiving electronic publications. In this connection, it is necessary to distinguish between exchange relations of individual institutions and those of states intending to inform each other of their activities as expressed in government publications. This report reviews the United Nations Educational, Scientific, and Cultural Organization (UNESCO) Convention of 1958 Concerning the International Exchange of Official Publications and Government Documents between States, considering its most important statements and determinations, as well as describing the practice of their implementation in Germany by the Exchange Centre in the Berlin State Library. (Author/MES)