@ARTICLE{10665-228196, author = {World Health Organization}, journal = {Weekly Epidemiological Record = Relevé épidémiologique hebdomadaire}, title = {Maternal mortality : Surveillance in Puerto Rico, 1989 = Mortalité maternelle : Surveillance à Porto Rico, 1989}, volume = {66}, year = {1991}, number = {46}, type = {Journal / periodical articles}, pages = {340 - 342} }