Title: Notas sobre dos especies de raya de agua dulce (C[h]ondrichthyes, Potamotrygonidae) =
First published: 1970
Subjects: Classification, Fishes, Potamotrygon pauckei, Potamotrygon schroederi
Places: South America
LC classification: Q33 .A3 no. 9, QL638.85.P6 .A3 no. 9