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1990(ALSO RESOLUTIONS AND OPINIONS)VOLUMES X AND XI-PART 31990 年出版118 页ISBN：
INTERNATIONAL TELECOMMUNICATION UNION REPORTS OF THE CCIR
1990(ALSO DECISIONS)ANNEX TO VOLUMES X AND XI-PART 21990 年出版676 页ISBN：
CONTEMPORARY AFRICAN POLITICS AND DEVELOPMENT:A COMPREHENSIVE BIBLIOGRAPHY
1981-19901994 年出版1314 页ISBN：1555873340
ETHNICITY IN ZIMBABWE TRANSFORMATIONS IN KALANGA AND NDEBELE SOCIETIES
1860-19902012 年出版305 页ISBN：1580464181
THE SUPERPOWERS AND AFRICA:THE CONSTRAINTS OF A RIVALRY
1960-19901990 年出版232 页ISBN：0226467821
INTERNATIONAL BROADCASTING CONVENTION Venue Metropole Conference and Exhibition Centre righton
UK 21-25 September 19901990 年出版424 页ISBN：085296000X
The Tokyo Forum the proceedings on development strategies for least developed countries in the 1990s
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REPORTS AND STUDIES NO.41 REPORT OF THE TWENTIETH SESSION GENEVA
7-11 MAY 19902222 年出版32 页ISBN：
