The optical properties of the G89.0+4.7 (HB 21) supernova remnant

Publisher: Edp Sciences

E-ISSN: 1432-0746|461|3|991-997

ISSN: 0004-6361

Source: Astronomy & Astrophysics, Vol.461, Iss.3, 2007-01, pp. : 991-997

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