Vosmaeer, G.C.J.   1854-1916. <br/><br/>
The Porifera of the Siboga-Expedition / 
by G. C. J. Vismaer and J. H. Vernhout. 
 - Leiden :  E. J. Bril,  1902. 
 - 17 p. :  ill., plates;  34 cm. 
 - Siboga-expeditie  VIa .
<br/><br/><label>Subjects--Topical Terms: </label><br/> Sponges.<br/> Genus Placospongia.