@article {1969ApJ...158..491D,
	title = {Radiofrequency Recombination Lines from Heavy Elements: Carbon},
	journal = {\apj},
	volume = {158},
	year = {1969},
	month = {nov},
	pages = {491},
	doi = {10.1086/150213},
	author = {Dupree, A.~K.}
}
