Trease, G. E., & Evans, W. C. Farmacognosia (2a ed.).
Lua i Stíl Chicago (17ú heag.)Trease, George Edward, agus William Charles Evans. Farmacognosia. 2a ed.
Lua MLA (8ú heag.)Trease, George Edward, agus William Charles Evans. Farmacognosia. 2a ed.
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