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Lua i Stíl Chicago (17ú heag.)Breward, C., R. Darton, P. Howell, agus J. Ockendon. The Effect of Surfactants on Expanding Free Surfaces. 2001.
Lua MLA (9ú heag.)Breward, C., et al. The Effect of Surfactants on Expanding Free Surfaces. 2001.
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