South African Bureau of Standards. (1964). Standard specification for wooden telephone and general purpose electric light poles. Council of the South Africa Bureau of Standards.
Citace podle Chicago (17th ed.)South African Bureau of Standards. Standard Specification for Wooden Telephone and General Purpose Electric Light Poles. South Africa: Council of the South Africa Bureau of Standards, 1964.
Citace podle MLA (9th ed.)South African Bureau of Standards. Standard Specification for Wooden Telephone and General Purpose Electric Light Poles. Council of the South Africa Bureau of Standards, 1964.
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