Organização Mundial da Saúde.
World health statistics annual = =Annuaire de statistiques sanitaires mondiales / World Health Organizations
World health statistics annual = =Annuaire de statistiques sanitaires mondiales / World Health Organizations
. - Genève : World Health Organization, 1993
. - 385 p., pag. var. 30 cm
92-4-067920-0 Brochado
31:614
614:31