共 50 条
- [16] SLOPE DEVELOPMENT IN THE KLERKSPRUIT VALLEY, ORANGE-FREE-STATE, SOUTH-AFRICA ZEITSCHRIFT FUR GEOMORPHOLOGIE, 1990, 34 (04): : 409 - 421
- [18] Rock Paintings in South Africa from Parts of the Eastern Province and Orange Free State AFRICA, 1931, 4 (04): : 516 - 518