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2 matching references were found.
Rao, P.S.R., Vibrational intensities of the O2+ (first negative) bands, Proc. Phys. Soc. London, 1963, 81, 240. [all data]
Rao, P.S.R., A comparison of intensities of the O2+ (first negative) bands excited in a hollow-cathode discharge and in aurorae, Nature (London), 1964, 201, 1112. [all data]