Logan, J S <br/><br/>
The disability in so-called red-green blindness: an account based on many years of self-observation.  [electronic resource] 

 -  The Ulster medical journal  1977 
 - 41-5 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0041-6193 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Color Vision Defects<br/>Humans<br/>Male<br/>Occupations