SIMBAD references

1988PASJ...40..581P - Publ. Astron. Soc. Jap., 40, 581-591 (1988)

Radio recombination line observations of the Orion nebula and M 17: the He/H ratio.

PEIMBERT M., UKITA N. and HASEGAWA T.

Journal keyword(s):

Simbad objects: 6

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