00326nam a2200085Ia 450000500170000000800410001708200220005824500710008026000890015120250107154804.0241216s9999||||xx |||||||||||||| ||und||  aREF 312.09678 TAN 0aFertility and mortality data for rural and urban  areas of regions  aDar es salaambBureau of statistics ministry of planning and economic affairs,c1982