المؤلفون: Kadango, TL, Assefa, Y, Mnkeni, PNS, Niba, AS

المصدر: http://ageconsearch.umn.edu/record/340682.

Relation: https://ageconsearch.umn.edu/record/340682/files/Kadango.pdf; http://ageconsearch.umn.edu/record/340682

الاتاحة: https://doi.org/10.22004/ag.econ.340682
http://ageconsearch.umn.edu/record/340682
https://ageconsearch.umn.edu/record/340682/files/Kadango.pdf