Sea urchins II: Worldwide irregular deep water species
Schultz, H. (2009). Sea urchins II: Worldwide irregular deep water species. Heinke & Peter Schultz Partner Scientific Publications: Hemdingen. ISBN 3-9809868-3-7. X, 501-849 pp.
Continues:Schultz, H. (2006). Sea urchins: A guide to worldwide shallow water species. Third edition. Heinke & Peter Schultz Partner Scientific Publications: Hemdingen. ISBN 3-9809868-2-9. XII, 484 pp., more
Continued by:Schultz, H. (2011). Sea urchins III: Worldwide regular deep water species. Heinke & Peter Schultz Partner Scientific Publications: Hemdingen. ISBN 3-9809868-4-5. 861-1338 pp., more
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