@booklet {7665,
	title = {BARBER, B. 1991. Phosphate resources of carbonatites in Zimbabwe. Fertilizer Research, 30: 247-78.K. Walsh, pers. comm., 2000.},
	year = {1991},
	note = {BARBER, B. 1991. Phosphate resources of carbonatites in Zimbabwe. Fertilizer Research, 30: 247-78.K. Walsh, pers. comm., 2000.}
}
