@book {1171, title = {The Hexactinellida of the Siboga Expedition.}, series = {Siboga-Expeditie. Uitkomsten op zoologisch, botanisch, oceanographisch en geologisch gebied verzameld in Nederlandsch Oost-lndi{\"e} 1899- 1900 aan boord H.M. {\textquoteleft}Siboga{\textquoteright} onder commando van Luitenant ter zee 1e kl. G.F. Tydemann.}, volume = {Monographie VI}, year = {1927}, pages = {Pp. i-viii, 1-383, pls I-XXVI}, publisher = {E.J. Brill}, organization = {E.J. Brill}, edition = {Weber, M.}, address = {Leiden}, author = {Ijima, I.}, editor = {Yaichiro Okada} }