Howell, Thomas,  1842-1912. <br/><br/>
A catalogue of the known plants,  (Phænogamia and Pteridophyta) of Oregon, Washington, and Idaho; 
by Thomas Howell. 
 - [Arthur, Ore.]  1887. 
 - 2 p. l., 28 p.  24 cm. 
<br/><br/><label>LCCN: </label>agr10001278  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plants--Northwestern States.
<br/><br/><label>LC Class. No.: </label>QK144  / .H55 
<br/><br/><label>National Agricultural Library Call No.: </label>455.8H83C