Ritter von Westersheim, d8.1..21.10 <br/><br/>
Handbuch der systematischen Botanik. 

 - Vierte, umgearbeite Auflage. 
 - Leipzig ; Wien :  Leipzig ; Wien :  Franz Deuticke,  1935. 
<br/><br/> Also issued in 2 v., 1933-35, paged continuously. Bd. I partly revised by author before his death. Work finished by his son, Fritz Wettstein. cf Geleitwort. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botany -- Classification.--Botany -- Classification.