https://dds.las.ac.cn/service/document?appId=a1vacbnPuv9qJRzJvdNXfsesj9JbIa6e&appKey=sPBA4vANLzjnW1k5eufEcc4k7dxfNraW&ts=1763023125702&signature=d9c56be8ea94845f36e2e998f6216415&articleTitle=Inland+Waters+of+Southern+Africa%3A+An+Ecological+Perspective&articleAuthor=B.R.+Allanson%2C+R.C.+Hart%2C+J.H.+O%27Keeffe%2C+R.D.+Robarts&publicationTitle=Inland+Waters+of+Southern+Africa%3A+An+Ecological+Perspective&language=&publicationType=1&publishYear=1990&isn=9780792302667&publisher=Springer+Netherlands