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1989ApJ...345..186T - Astrophys. J., 345, 186-195 (1989/October-1)
Physical conditions of HII regions in M 101 and the pregalactic helium abundance.
TORRES-PEIMBERT S., PEIMBERT M. and FIERRO J.
Abstract (from CDS):
Abstract Copyright: ∼
Journal keyword(s): Galaxies: Individual Messier Number: M101 - Galaxies: Nuclei - Nebulae: Abundances - Nebulae: H ii Regions
Simbad objects: 13
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