Official program, XV International congress on hygiene and demography,  Washington, D. C., September 23-28, 1912. 

 - [Washington?  1912] 
 - 174 p. 
<br/><br/> English, French and German. 
<br/><br/><label>LCCN: </label>ca 13000251  
<br/><br/><label>LC Class. No.: </label>RA422  / .I6 1912h 
<br/><br/><label>National Library of Medicine Call No.: </label>W3  / IN409 1912o