@inbook{56ed121ff7c740b1a53ef4a111975a55,
title = "Holocene vegetation changes in the Sahelian zone of NE Nigeria: detecting anthropogenic activity",
keywords = "Geography and environmental studies",
author = "M.P. Waller and U. Salzmann",
note = "Note: Proceedings of the Third Conference on African Palynology, Johannesburg, 14-19 September 1997.",
year = "1999",
language = "English",
isbn = "9789054104766",
series = "Palaeoecology of Africa",
publisher = "Taylor \& Francis",
number = "26",
pages = "85--102",
editor = "Heine Klaus",
booktitle = "Palaeoecology of Africa and the Surrounding Islands",
}