?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=B&rft.au=Gebrekidan%2C+B&rft.aulast=Gebrekidan&rft.date=1985&rft.title=A+review+of+the+role+of+Agricultural+Research%2C+Technology+And+Policy+In+The+Seasonality+Of+Household+Food+Supply+And+Production+In+Sub-Saharan+Africa&rft.genre=proceeding