Finks, R.M. & Rigby, J.K., 2004a. Paleozoic Demosponges. In R.M. Finks, R.E.H. Reid & J.K. Rigby, Volume 3: Porifera (Demospongea, Hexactinellida, Heteractinida, Calcarea). In R.L. Kaesler (ed.), Treatise on Invertebrate Paleontology, Part E, Porifera (Revised). The Geological Society of America, Inc. and The University of Kansas, Boulder, Colorado, and Lawrence, Kansas: 9-174.
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Finks, R.M. & Rigby, J.K., 2004b. Paleozoic Hexactinellid Sponges. In R.M. Finks, R.E.H. Reid & J.K. Rigby, Volume 3: Porifera (Demospongea, Hexactinellida, Heteractinida, Calcarea). In R.L. Kaesler (ed.), Treatise on Invertebrate Paleontology, Part E, Porifera (Revised). The Geological Society of America, Inc. and The University of Kansas, Boulder, Colorado, and Lawrence, Kansas: 319-448.
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Finks, R.M. & Rigby, J.K., 2004c. Heteractinida. In R.M. Finks, R.E.H. Reid & J.K. Rigby, Volume 3: Porifera (Demospongea, Hexactinellida, Heteractinida, Calcarea). In R.L. Kaesler (ed.), Treatise on Invertebrate Paleontology, Part E, Porifera (Revised). The Geological Society of America, Inc. and The University of Kansas, Boulder, Colorado, and Lawrence, Kansas: 557-584.
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Finks, R.M. & Rigby, J.K., 2004d. Hypercalcified Sponges. In R.M. Finks, R.E.H. Reid & J.K. Rigby, Volume 3: Porifera (Demospongea, Hexactinellida, Heteractinida, Calcarea). In R.L. Kaesler (ed.), Treatise on Invertebrate Paleontology, Part E, Porifera (Revised). The Geological Society of America, Inc. and The University of Kansas, Boulder, Colorado, and Lawrence, Kansas: 585-764.
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