@manual{icrisat673,
       publisher = {International Crops Research Institute for the Semi-Arid Tropics},
            year = {1980},
            type = {Manual},
           title = {Manuel de climatologie pluviale de fAfrique occidentale: Donnees pour des stations selectionnees},
          author = {S M Virmani and S J Reddy and M N S Bose},
             url = {http://oar.icrisat.org/673/}
}