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1.
Magnitudes and Colors of Stars North of +80 Degrees: Carnegie Institution of Washington, No.... by Frederick Hanley Seares, Fr... ISBN: 9781258415785 List Price: $26.15
2.
Magnitudes And Colors Of Stars North Of +80 Degrees: Carnegie Institution Of Washington, No.... by Frederick Hanley Seares, Fr... ISBN: 9781258423506 List Price: $23.95