?url_ver=Z39.88-2004&rft_id=10.1016%2Fj.foodpol.2016.01.005&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=A&rft.au=Zezza%2C+A&rft.aulast=Zezza&rft.atitle=Milking+the+data%3A+Measuring+milk+off-take+in+extensive+livestock+systems.+Experimental+evidence+from+Niger&rft.title=Food+Policy&rft.issn=03069192&rft.date=February+2016&rft.volume=59&rft.pages=174-186&rft.genre=article