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N.D. (AP) – North Dakota’s new Blue Book pays tribute to 125 years of statehood.

Secretary of State Al Jaeger unveiled the 30th edition of the book on Wednesday. The manual profiles North Dakota’s past and present and compiles statistical and historical information that often isn’t available elsewhere.

The Blue Book is published every two years and assembled with the help of about 50 volunteers. It includes a DVD that duplicates the book’s content.

The 556-page softcover book is being sold for $20 at the North Dakota Heritage Center’s museum store, and it can also be ordered through the store’s online site.