Merz, E <br/><br/>
[Certified sonographic screening and certified biochemical test in early pregnancy].  [electronic resource] 

 -  Ultraschall in der Medizin (Stuttgart, Germany : 1980)  Jun 2002 
 - 161-2 p.  digital 
<br/><br/> Publication Type: Editorial 
<br/><br/><label>ISSN: </label>0172-4614 
<br/><br/><label>Standard No.: </label>10.1055/s-2002-33153  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Certification<br/>Female<br/>Humans<br/>Pregnancy<br/>Quality Control<br/>Ultrasonography, Prenatal--standards