Thonner, Franz, 1863- <br/><br/>
Thonner's analytical key to the families of flowering plants/ 
R. Geesink ...(et al.) 
 - Wageningen:  Pudoc Centre for Agricultural Publishing and Documentation,  1981. 
 - 231 p. :  ill. ;  23 cm. 
 - Leiden botanical series  v.5 .
<br/><br/> Includes index  Translated and revised edition of: Anleitung zum Bestimmen der Familien der Blutenpflanzen, 2nd ed. 1917 
<br/><br/><label>ISBN: </label>906021479X 
<br/><br/><label>LCCN: </label>81-8119 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Phanerogams--Identification.<br/>Plants--Identification.