Carl Troll (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Carl Troll" in English language version.

refsWebsite

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2^nd place

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1books.google.com

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books.google.com

Hardoy, Jorge Henríque (1973). Pre-Columbian Cities. Routledge. p. 24. ISBN 978-0802703804.

doi.org

Gade, Daniel W. (1996). "Carl Troll on Nature and Culture in the Andes (Carl Troll über die Natur und Kultur in den Anden)". Erdkunde. 50 (4): 301–316. doi:10.3112/erdkunde.1996.04.02.

springer.com

Gade, Daniel (2016). "Urubamba Verticality: Reflections on Crops and Diseases". Spell of the Urubamba: Anthropogeographical Essays on an Andean Valley in Space and Time. Springer. p. 86. ISBN 978-3-319-20849-7.