Hedberg,Olov <br/><br/>
Systematics of to-day  proceedings of a Symposium held at the 250th anniversaryof the Birth of Carolus Linneaus. 

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 - Uppsala - SUEC  Universitets Arsskrift  1958 
 - 243p.  24 cm 
 - Acta Universitstis Upsaliensis   .
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