Template:Mortensen, 1951

• Mortensen, T. 1951. A Monograph of the Echinoidea. V, 2. Spatangoida II. Amphisternata II. Spatangidæ, Loveniidæ, Pericosmidæ, Schizasteridæ, Brissidæ. C. A. Reitzel, Copenhagen, 593 pp.  
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Nomenclatural acts

• Date of publication: 1951