Chen, P. S. (1950). Syntans and newer methods of tanning. The Chemical Elements.
Lua i Stíl Chicago (17ú heag.)Chen, Philip Stanley. Syntans and Newer Methods of Tanning. South Lancaster, MA: The Chemical Elements, 1950.
Lua MLA (9ú heag.)Chen, Philip Stanley. Syntans and Newer Methods of Tanning. The Chemical Elements, 1950.
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