Filtering by: Creator Degen de Arrúa, Rosade Arrúa, Rosa Degen Remove constraint Creator: Degen de Arrúa, Rosade Arrúa, Rosa Degen Creator Scotland, R. W.Scotland, R. W. Remove constraint Creator: Scotland, R. W.Scotland, R. W. Keyword Ipomoea Remove constraint Keyword: Ipomoea Keyword Paraguay Remove constraint Keyword: Paraguay Resource Type Journal article Remove constraint Resource Type: Journal article