Matches in Library of Congress for { ?s ?p Astrophysics Observations.. }
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- 00294063 subject "Astrophysics Observations.".
- 2011942601 subject "Astrophysics Observations.".
- 81601204 subject "Astrophysics Observations.".
- 83016349%2F%2Fr98 subject "Astrophysics Observations.".
- 86161948 subject "Astrophysics Observations.".
- 87030532 subject "Astrophysics Observations.".
- 93162450 subject "Astrophysics Observations.".
- 97047092 subject "Astrophysics Observations.".