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J/ApJ/559/864
 Extragalactic ultracompact H II regions (Johnson+, 2001)
img(gal)
    J/ApJ/559/864/ngc6946(c)Ultra-dense HII candidates in NGC 6946 (adopted distance: 5.1Mpc) (16 rows)
    J/ApJ/559/864/m33(c)Ultra-dense HII candidates in M33 (adopted distance: 840kpc) (14 rows)
    J/ApJ/559/864/ngc0253(c)Ultra-dense HII candidates in NGC 253 (adopted distance: 2.5Mpc) (5 rows)

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       (c)  indicates tables which contain celestial coordinates 
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