Graphs on health progress in Puerto Rico during the present century. 

 - San Juan, P. R.  [Section of Biostatistics. Dept.of Preventine medicine... University of Puerto Rico]  1960. 
 - 1 v. (unpaged)  graphs. 
<br/><br/> Cover title : Health progress in Puerto Rico. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hygiene, Public--Puerto Rico.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Puerto Rico