@manual{icrisat2417,
          number = {Skill Development Series no. 6},
          author = {F Singh and D L Oswalt},
            year = {1992},
           title = {Major Diseases of Groundnut },
       publisher = {International Crops Research Institute for the Semi-Arid Tropics},
            type = {Manual},
             url = {http://oar.icrisat.org/2417/}
}