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Dyfyniad Arddull ChicagoOssenbach, Carlos. Orchids in the Era of Grigory Von Langsdorff: Two Golden Decades in the History of the Botanical Exploration of Brazil (1813–1830). 2018.
Dyfyniad MLAOssenbach, Carlos. Orchids in the Era of Grigory Von Langsdorff: Two Golden Decades in the History of the Botanical Exploration of Brazil (1813–1830). 2018.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.