Gifford, G E <br/><br/>
Medicine and natural history--crosscurrents in Philadelphia in the nineteenth century.  [electronic resource] 

 -  Transactions & studies of the College of Physicians of Philadelphia  Jan 1978 
 - 139-49 p.  digital 
<br/><br/> Publication Type: Historical Article; Journal Article 
<br/><br/><label>ISSN: </label>0010-1087 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biology--history<br/>Botany--history<br/>History, 19th Century<br/>Pennsylvania