Matches in Library of Congress for { ?s ?p 491.7 19. }
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- 80108053 subject "491.7 19".
- 81175051%2F%2Fr94 subject "491.7 19".
- 81450970 subject "491.7 19".
- 81481959 subject "491.7 19".
- 82112262 subject "491.7 19".
- 82174635 subject "491.7 19".
- 83120615 subject "491.7 19".
- 83139045 subject "491.7 19".
- 83156694 subject "491.7 19".
- 83189512 subject "491.7 19".
- 83193783 subject "491.7 19".
- 83237371 subject "491.7 19".
- 84159490 subject "491.7 19".
- 84251956%2F%2Fr90 subject "491.7 19".
- 87410026 subject "491.7 19".