Henry Wickham (penjelajah) (Indonesian Wikipedia)
Analysis of information sources in references of the Wikipedia article "Henry Wickham (penjelajah)" in Indonesian language version.
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archive.org
- Ponting, Clive (2007). A New Green History of the World: The Environment and the Collapse of Great Civilizations
. New York: Penguin Books. hlm. 183. ISBN 978-0-14-303898-6.
books.google.com
- Dean, Warren (1987). Brazil and the Struggle for Rubber: A Study in Environmental History. Cambridge University Press. ISBN 9780521526920.