Rongjun
Chen.1998. Livestock-biogas-fruit systems in South China
In: Proceedings of the Internet Conference
on Integrated Biosystems. Eds: Eng-Leong Foo & Tarcisio Della Senta.
http://www.ias.unu.edu/proceedings/icibs/chen
Chicken House
A pigsty with a concealed biogas digester underneath
