Various. Encyclopaedia Britannica, 11th Edition, "Helmont, Jean" to "Hernosand" Volume 13, Slice 3.
Cita Chicago Style (17a ed.)Various. Encyclopaedia Britannica, 11th Edition, "Helmont, Jean" to "Hernosand" Volume 13, Slice 3.
Cita MLA (9a ed.)Various. Encyclopaedia Britannica, 11th Edition, "Helmont, Jean" to "Hernosand" Volume 13, Slice 3.
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