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1987PN86........91P - Planetary and Proto-Planetary Nebulae: From IRAS to ISO. Proc. Frascati Workshop, Vulcano Island, Sep. 8-12, 1986 Ed. A. Preite-Martinez., 91-100 (1987)
On the nitrogen and helium enrichment of the interstellar medium.
PEIMBERT M.
Journal keyword(s):
Simbad objects: 15
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