Johnson, W. H. (1904). Cultivation and preparation of para rubber. Crosby lockwood & sons.
Chicago Edition CitationJohnson, W H. Cultivation and Preparation of Para Rubber. London: Crosby lockwood & sons, 1904.
Cita MLAJohnson, W H. Cultivation and Preparation of Para Rubber. Crosby lockwood & sons, 1904.
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