@article{Walker:59637,
      recid = {59637},
      author = {Walker, T.S. and Alwang, J.},
      title = {Crop Improvement, Adoption and Impact of Improved  Varieties in Food Crops in Sub-Saharan Africa},
      publisher = {Consortium of International Agricultural Research Centres  (CGIAR),},
      address = {Montpellier (France):},
      pages = {450 p.},
      year = {2015},
      url = {http://wfp.tind.io/record/59637},
}