Astron. Astrophys. 347, 455-472 (1999)

Acknowledgements

We are indebted to E.K. Grebel for the most interesting and valuable discussions, especially on the technique of differential dereddening. We would like to thank the referee D. Minniti for helpful comments and criticism.

© European Southern Observatory (ESO) 1999

Online publication: June 30, 1999
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