@book{54789,
	author = {Williams, R. J. and Frederiksen, R. A.},
	title = {Manual de identification des maladies du sorgho et du mil},
	publisher = {International Crops Research Institute for the Semid-Arid Tropics,},
	year = {1978},
	series = {Bulletin d'information},
	address = {Hyderabad, India :}
}