Lawton, Elva,  1896- <br/><br/>
Moss flora of the Pacific Northwest / 
Elva Lawton 
 - Nichinan :  Hattori botanical laboratory,  1971 
 - xiii, 362 p. :  ill. ;  31 cm. 
<br/><br/>Bibliography : p. 341 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mosses--Identification--Northwest, Pacific