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S. J. Adelmann: Elemental abundance analyses with DAO spectrograms. – VII. The late normal B stars Pi Ceti, 134 Tauri, 21 Aquilae, and Nu Capricorni and the use of Reticon spectra. In: Monthly Notices of the Royal Astronomical Society. Bd. 252, Nr. 1, 1991, S. 116–131, doi:10.1093/mnras/252.1.116 (PDF; 320 kB).