Pieter Nicolaas van Kampen (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Pieter Nicolaas van Kampen" in English language version.

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656^th place

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books.google.com

The Eponym Dictionary of Reptiles by Bo Beolens, Michael Watkins, Michael Grayson
The Eponym Dictionary of Amphibians by Bo Beolens, Michael Watkins, Michael Grayson

Kampen, Pieter Nicolaas van (Source: Flora Malesiana ser. 1, 1: Cyclopaedia of collectors