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- Language: Dutch
- Year: 1975
- Author: Yvonne Bastin, André Coupez, Michael Mann
- Language: English
- Year: 1999
- Author: Thilo C. Schadeberg
- Language: English
- Year: 1981
- Author: Peter K. Norquest
- Language: English
- Year: 2015
- Author: Kiyoshi Shimizu
- Language: English
- Year: 1978
- Author: 颜其香, 周植志 / Yan Qixiang, Zhou Zhizhi
- Language: Chinese
- Year: 2012
- Author: J. Pedro Viegas Barros
- Language: Spanish
- Year: 2001
- Author: Bernd Heine
- Language: English
- Year: 1976
- Author: Stefano Santandrea
- Language: English
- Year: 1976