Rubinstein, E <br/><br/>
Age-specific risk of tuberculosis infection.  [electronic resource] 

 -  South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde  Jun 1981 
 - 848-9 p.  digital 
<br/><br/> Publication Type: Letter 
<br/><br/><label>ISSN: </label>0256-9574 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Adolescent<br/>Age Factors<br/>Child<br/>Child, Preschool<br/>Humans<br/>Risk<br/>South Africa<br/>Tuberculosis, Pulmonary--epidemiology