The World  book health and medical annual 1991. 

 - Chicago :  World book,  1991. 
 - 400 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Health -- Periodicals.<br/>Medicine, popular -- Periodicals.<br/>Public health -- Popular works -- Periodicals.
<br/><br/><label>LC Class. No.: </label>RA431  / .W65