?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=S+N&rft.au=Nigam%2C+S+N&rft.aulast=Nigam&rft.date=1983&rft.title=Groundnut+in+Southern+Africa+-Its+Status+and+Research+Requirements&rft.genre=proceeding