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Published online by Cambridge University Press: 22 September 2016
The detailed spectral study in the region λλ6,000–11,000 of eight planetary nebulae: NGC 6210, 6572, 6891, 7662, IC 2149, 4593, 4997 and BD+30° 3639 was carried out at the Crimean Station of Sternberg Astronomical Institute, using the 125-cm parabolic reflector with the contact image tube.