APA

National Programme for Environmental Sciences (África do Sul), . (1974). 1974 annual report of the inland waters section. Pretoria, South Africa: The Committee.

Chicago

National Programme for Environmental Sciences (África do Sul), . 1974. 1974 annual report of the inland waters section. Pretoria, South Africa: The Committee.

Harvard

National Programme for Environmental Sciences (África do Sul), . (1974). 1974 annual report of the inland waters section. Pretoria, South Africa: The Committee.

MLA

National Programme for Environmental Sciences (África do Sul), . 1974 annual report of the inland waters section. Pretoria, South Africa: The Committee. 1974.