?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=S&rft.au=Homann%2C+S&rft.aulast=Homann&rft.atitle=Towards+Endogenous+Livestock+Development%3A+Borana+Pastoralists%E2%80%99+Responses+to+Environmental+and+Institutional+Changes&rft.title=Human+Ecology&rft.issn=03007839&rft.date=2008&rft.volume=36&rft.pages=503-520&rft.issue=4&rft.genre=article