> Multivolume work
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3:
Encyclopedia of world constitutions 3 Oman to Zimbabwe ed. by Gerhard Robbers
New York: Facts On File, 20XX-
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2:
Encyclopedia of world constitutions 2 Gabon to Norway ed. by Gerhard Robbers
New York: Facts On File, 20XX-
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1:
Encyclopedia of world constitutions 1 Afghanistan to France ed. by Gerhard Robbers
New York: Facts On File, 20XX-