Wallace, J.H. (1967)
The batoid fishes of the east coast of Southern Africa. Part III: Skates and Electric Rays. Investigational Report Oceanographic Research Institute, 17, 1–62
Wallace, J.H. (1967)
The batoid fishes of the east coast of Southern Africa. Part II: Manta, Eagle, Duckbill, Cownose, Butterfly and Sting Rays. Investigational Report Oceanographic Research Institute, 16, 1–56
Wallace, J.H. (1967)
The batoid fishes of the east coast of southern Africa. Part I: Sawfishes and guitarfishes. Investigational Report Oceanographic Research Institute, 15, 1–32