Wodehouse, P. Roger. <br/><br/>
Hayfever plants  Their appearance, distribution, time of flowering & their role in hayfever, with reference to North America 
by P. Roger Wodehouse. 
 - U.S.A.  Chronica Botanica Co  1945 
 - vi  245p. 
<br/><br/><label>Dewey Class. No.: </label>581.69  / N45