Umbgrove, Johannes Herman Frederik,  1899-1954. <br/><br/>
Leven en materie, 

 - 's-Gravenhage,  M. Nijhoff,  1943. 
 - viii, 132 p.  illus., fold. pl., diagrs.  25 cm. 
<br/><br/><label>LCCN: </label>af 47002675  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Evolution<br/>Life (Biology)
<br/><br/><label>LC Class. No.: </label>QH366  / .U56