Lewis Knudson (Spanish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Lewis Knudson" in Spanish language version.

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1plantphysiol.org

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archive.org

Rosendahl, Carl Otto; Butters, Frederic K. (1928). Trees and shrubs of Minnesota (en inglés). Minneapolis, Minnesota: The University of Minnesota press.

jstor.org

Knudson, L. 1922. Nonsymbiotic Germination of Orchid Seeds Botanical Gazette, Vol. 73, No. 1 pp. 1-25.

plantphysiol.org

Clarke, D. 1959. Lewis Knudson (1884-1958) Plant Physiol. 32:156.

web.archive.org

Croezen, P. In vitro Orchid cultivation Orchidmania Organization. Consultado el 19 de febrero de 2010.