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\bibitem{Hamers_etal1997} Hamers, R., Lehmann, J., Sch{\"u}tt, D. - A., \& Goerlich, R. (1997). \textit{Haematology pf swordtail, Xiphophorus helleri. II: cellular composition and isolatopn of blood cells from kidney of Xiphophorus helleri} (Vol. 13).

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