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Lindholm W.A. (1932). On the finding of the American species Helisoma trivolvis Say (Gastropoda, Planobidae) in the Pleistocene deposits of the Kolyma River [= О нахождении американского Helisoma trivolvis Say (Gastropoda, Planorbidae) в плейстоцене р. Колымы]. Trudy Komissii po izucheniyu proizvoditel'nykh sil AN SSSR. Seriya yakutskaya. 11: 65–73. [In Russian].
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Lindholm W.A.
1932
On the finding of the American species Helisoma trivolvis Say (Gastropoda, Planobidae) in the Pleistocene deposits of the Kolyma River [= О нахождении американского Helisoma trivolvis Say (Gastropoda, Planorbidae) в плейстоцене р. Колымы]
Trudy Komissii po izucheniyu proizvoditel’nykh sil AN SSSR. Seriya yakutskaya
11: 65–73. [In Russian]
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