Ruggles,R. <br/><br/>
The mutation factor in evolution  with particular reference to oenothera  

 - London   Macmillan and co., limited, ST. ,Martin's street,London  1915 
 - xiv, 353p. : ill , map ; 23 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plants
<br/><br/><label>Universal Decimal Class. No.: </label>13  / D17