@article{Aalto_2015,
title={Hermann Karsten,
pioneer of geologic mapping in northwestern South America},
volume={6},
ISSN={2190-5029},
url={http://dx.doi.org/10.5194/hgss-6-57-2015},
DOI={10.5194/hgss-6-57-2015},
number={1},
journal={History of Geo- and Space Sciences},
publisher={Copernicus GmbH},
author={Aalto,
K. R.},
year={2015},
month=jun,
pages={57–63} }