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\bibitem{Schwevers+Adam1997} Schwevers, U., \& Adam, B. (1997). \textit{Zur Gef{\"a}hrdung der Elritze, Phoxinus phoxinus (L.), durch {\"u}berh{\"o}te Best{\"a}nde des Aals, Anguilla anguilla (L.)} (Vol. 48).

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