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Astron. Astrophys. 331, 853-856 (1998) AcknowledgementsIt is a pleasure to thank the Time Allocation Committee for awarding discretionary ISO observing time to this project. I am also grateful to the referee, Dr. Ray Weymann, for valuable comments which improved the manuscript.
© European Southern Observatory (ESO) 1998 Online publication: March 3, 1998 ![]() |