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https://www.aanda.org/articles/aa/abs/2008/06/aa8480-07/aa8480-07.html
The color excess of quasars with intervening DLA systems - Analysis of the SDSS data release five |...
Astronomy & Astrophysics (A&A) is an international journal which publishes papers on all aspects of astronomy and astrophysics
color excess
systems analysis
quasars
intervening
dla