Não informado. (1953). Fibres, natural and synthetic. Leonard Hill Technical Group.
Lua i Stíl Chicago (17ú heag.)Não informado. Fibres, Natural and Synthetic. London: Leonard Hill Technical Group, 1953.
Lua MLA (8ú heag.)Não informado. Fibres, Natural and Synthetic. Leonard Hill Technical Group, 1953.
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