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Astron. Astrophys. 354, L6-L8 (2000) AcknowledgementsAuthors thank Tom Millar for sending UMIST database electronically and the referee for several helpful comments. SC thanks the Council for Scientific and Industrial Research (CSIR) for financial support and SNBNCBS for technical support. ![]() ![]() ![]() ![]() © European Southern Observatory (ESO) 2000 Online publication: January 31, 2000 ![]() |