Bager, Bertel. <br/><br/>
Nature as designer :  a botanical art study / 
Bertel Bager. 
 - London :  F.Warne,  1967. 
 - 176p :  ill. ;  26 cm. 
<br/><br/> Originally published as 'Naturen som Formgivare'. Stockholm : Nordisk Rotogravyr,1955.