Collins, Mary. [from old catalog] <br/><br/>
Colour-blindness :  with a comparison of different methods of testing colour-blindness / 
Mary Collins 
 - London :  K. Paul, Trench, Trubner & co., ltd. ,  1925. 
 - xxxi, 237 p. :  ill. ;  22 cm. 
<br/><br/>Includes bibliography and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Color blindness.
<br/><br/><label>Dewey Class. No.: </label>617.7  / COC 1925