Crossref Citations
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Perinotto, M.
1987.
Planetary and Proto-Planetary Nebulae: From IRAS to ISO.
Vol. 135,
Issue. ,
p.
13.
Published online by Cambridge University Press: 18 September 2017
Ultraviolet and optical observations of seven very low excitation nebulae (He 2-131, He 2-138, TC 1, M 1-11, M 1-12, M 1-26, H 2-1) and of two low-excitation nebulae (IC 418 and He 2-108) are discussed.