World Encyclopedia of Political Systems and Parties．Volume Ⅲ，Oman-Zimbabwe World Encyclopedia of Political Systems and Parties．Volume Ⅱ，Gabon-Norway World Encyclopedia of Political Systems and Parties．Volume Ⅰ，Afghanistan-France world encyclopedia of political systems and parties world encyclopedia of political systems & parties World Encyclopedia of Political Systems and Parties World Encyclopedia of Political Systems & Parties World Encyclopedia of Political Systems & Parties．Volume Ⅱ，Nepal-Zimbabwe and Smaller Countries and Microstates