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International Astronomical Union Colloquium (125a : 1989 : Puschino, U.S.S.R.)
Radio recombination lines : 25 years of investigation.
— Dordrecht : Kluwer, 1990. 298 p. — (Astrophysics and space science library ; no. 163)
Proceedings of the 125th Colloquium of the International Astronomical Union, held in Puschino, U.S.S.R., september 11-16, 1989.
ISBN 0792308042
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