Gewölbte Kopfschildschnecke (German Wikipedia)

Analysis of information sources in references of the Wikipedia article "Gewölbte Kopfschildschnecke" in German language version.

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S. Tyrell Smith: The ecology and life history of Retusa obtusa (Montagu) (Gastropoda, Opisthobranchia). In: Canadian Journal of Zoology. 45, 1967, S. 397–405, doi:10.1139/z67-051.