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Astron. Astrophys. 346, 922-928 (1999) AcknowledgementsThe authors are thankful for the support by the Deutsche Forschungsgemeinschaft. F. Palla is cordially acknowledged for his kind supply of current TTS models. ![]() ![]() ![]() ![]() © European Southern Observatory (ESO) 1999 Online publication: June 17, 1999 ![]() |