Sirks, M J <br/><br/>
Zesde internationaal botanisch congres 
/ Proceedings Amsterdam 2-7 September 1935 
 - Leiden:   E J Brill,   1935 
 - xiii, 317p. 
<br/><br/> Vol. II 
<br/><br/><label>Universal Decimal Class. No.: </label>58(082.2)  / J5.2