skos:altLabel | - Vaal River Development Scheme (Amendment) Act, 1937
- Orange River Development Project Act, 1969
- Vaal River Development Scheme Act, 1934
- Vaal River Development Scheme Amendment Act, 1948
- Vaal River Development Scheme Amendment Act, 1967
- Vaal River Development Scheme Amendment Act, 1977
- Vaal River Development Scheme Amendment Act, 1982
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