W.H.O <br/><br/>
Study Group on The Ecology of Intermediate Snail Hosts of Bilharziasis 

 - Switzerland  World Health  1957 
 - 38 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Study Group on The Ecology of Inetermediate
<br/><br/><label>Dewey Class. No.: </label>595.12/W105S