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This cache is feasible only during the opening hours of the library! The City Library Hannover offers a wide range of media, which supports music education. 50,000 sheet music and 8,000 CDs and music DVDs are available for check out, in addition to a wide range of music literature. Simply rummage around the library yourself and you might pick up the cache along the way.
To determine the bonus number you have to figure out the digit sum, which is a single digit.
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