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Anonym 1871-1872: [Baird, W.] Proc. R. Soc. London 1871-1872, pp. xxiii-xxiv
Anonym 1871-1872: [Baird, W.] Proceedings of the Linnean Society of London, London 1871-1872, pp. IVIII-IX
Anonym 1872: [Baird, W.] American journal of science, devoted to the geological sciences and to related fields , New Haven/Conn. 3 (3), pp. 319-320