Guthrie, Douglas <br/><br/>
Janus in the doorway  Douglas Guthrie. 

 - London  Pitman Medical Publishing Co.  1963 
 - xii, 316p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science - history Research.
<br/><br/><label>Dewey Class. No.: </label>509  / G97J