@article{Kukla_1987,
title={Loess stratigraphy in central China},
volume={6},
ISSN={0277-3791},
url={http://dx.doi.org/10.1016/0277-3791(87)90004-7},
DOI={10.1016/0277-3791(87)90004-7},
number={3–4},
journal={Quaternary Science Reviews},
publisher={Elsevier BV},
author={Kukla,
George},
year={1987},
month=jan,
pages={191–219} }