Lian, Z H <br/><br/>
Birth defects epidemiology in the Beijing-Tianjin area.  [electronic resource] 

 -  Chinese medical journal  Oct 1987 
 - 800-4 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0366-6999 
<br/><br/><label>Subjects--Topical Terms: </label><br/>China<br/>Congenital Abnormalities--epidemiology<br/>Female<br/>Humans<br/>Infant, Newborn<br/>Pregnancy<br/>Seasons<br/>Sex Factors