
- Author: Shridath S. Ramphal, Seymour Topping
- Language: English
- Year: 2013

- Author: Gustaf Arrhenius Krister Bykvist Tim Campbell Elizabeth Finneron-Burns
- Language: English
- Year: 2022

- Author: Hengeveld Rob
- Language: English
- Year: 2012

- Author: Hengeveld Rob
- Language: English
- Year: 2012

- Author: Flannery Tim Fridtjof
- Language: English
- Year: 2017

- Author: Friedman Thomas L
- Language: English
- Year: 2009

清代西北生态变迁研究
pdf