Pangemanan S P, Hartono B, Devadoss S, Sondakh L W and Ali B 2014:
Economic analysis of traditional duck farmer’s household in Minahasa Regency North Sulawesi, Indonesia.
Livestock Research for Rural Development. Volume 26, Article #136.
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, from http://www.lrrd.org/lrrd26/7/pang26136.html