Matches in Library of Congress for { ?s ?p Level indicators.. }
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- 2005902459 subject "Level indicators.".
- 2006931512 subject "Level indicators.".
- 2008044970 subject "Level indicators.".
- 2009937873 subject "Level indicators.".
- 67048079 subject "Level indicators.".
- 68061916%2F%2Fr81 subject "Level indicators.".
- 80021922%2F%2Fr85 subject "Level indicators.".
- 85112434 subject "Level indicators.".
- 85128384 subject "Level indicators.".
- 95036235 subject "Level indicators.".