TY  - BOOK
AU  - Vosmaeer,G.C.J.
AU  - Vernhout,J.H.
TI  - The Porifera of the Siboga-Expedition
PY  - 1902///
CY  - Leiden
PB  - E. J. Bril
KW  -  Sponges
KW  -  Genus Placospongia
ER  -