N.B. Multi-authored works count once for each author; as a result, percentages may add up to slightly more than 100. In fact, however, they usually add up to slightly less, because works by unknown authors are not counted.
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N.B. Multi-authored works count once for each author; as a result, percentages may add up to slightly more than 100. In fact, however, they usually add up to slightly less, because works by unknown authors are not counted.