Astronomy & Astrophysics (A&A)

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Optical observations of BL Lacertae from 1997 to 1999

J. H. Fan, B. C. Qian and J. Tao

A&A, 369 3 (2001) 758-762

Published online: 15 April 2001

DOI: 10.1051/0004-6361:20010169

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