ARDITTI, JOSEPH; ELLIOTT, JOHN; KITCHING, IAN J.; WASSERTHAL, LUTZ T. ‘Good Heavens what insect can suck it’- Charles Darwin, Angraecum sesquipedale and Xanthopan morganii praedicta. Botanical Journal of the Linnean Society (Oxford University Press (OUP)). 2012-06-15, 169 (3): 403–432. ISSN 0024-4074. doi:10.1111/j.1095-8339.2012.01250.x.
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worldcat.org
ARDITTI, JOSEPH; ELLIOTT, JOHN; KITCHING, IAN J.; WASSERTHAL, LUTZ T. ‘Good Heavens what insect can suck it’- Charles Darwin, Angraecum sesquipedale and Xanthopan morganii praedicta. Botanical Journal of the Linnean Society (Oxford University Press (OUP)). 2012-06-15, 169 (3): 403–432. ISSN 0024-4074. doi:10.1111/j.1095-8339.2012.01250.x.