title:Yearbook of International Organizations 2011/2012 - Vol 6: Who's Who in International Organizations
5th edition. Volume 6 of 6 volumes. Also available Online, 12th edition
title:Yearbook of International Organizations 2011-2012 - Vol 5: Statistics, Visualizations and Patterns
11th edition. Volume 5 of 6 volumes. Also available Online, 12th edition
title:Yearbook of International Organizations 2011/2012 - Vol 4: International Organization Bibliography and Resources
16th edition. Volume 4 of 6 volumes. Also available Online, 12th edition
title:Yearbook of International Organizations 2011/2012 - Vol 3: Global Action Networks: A Subject Directory and Index
29th edition. Volume 3 of 6 volumes. Also available Online, 12th edition
title:Yearbook of International Organizations 2011/2012 - Vol 2: Geographical Index: A Country Directory of Secretariats and Memberships
29th edition. Volume 2 of 6 volumes. Also available Online, 12th edition
title:Yearbook of International Organizations 2011/2012 - Vol 1: Organization Descriptions and Cross-References
48th edition. Volume 1 of 6 volumes. Also available Online, 12th edition
title:International Congress Calendar
51st edition, 4 volumes
title:Yearbook of International Organizations 2010-2011 - Vol 6: Who's Who in International Organizations
4th edition. Volume 6 of 6 volumes. Also available Online, 11th edition
title:Yearbook of International Organizations 2010-2011 - Vol 5: Statistics, visualizations and patterns
10th edition. Volume 5 of 5 volumes. Also available Online, 11th edition
title:Yearbook of International Organizations 2010-2011 - Vol 4: Bibliographic Volume: International Organization Bibliography and Resources
15th edition. Volume 4 of 6 volumes. lso available Online, 11th edition. Erratum: This volume was printed with the incorrect title on the cover: "Yearbook of International Associations"; correct title is "Yearbook of International Organizations"
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