The Echinoderms of Peru. Bulletin of the Museum of Comparative Zoology at Harvard College, 52 1910: (321-358). [Zoological Record Volume 49]
The Echinoderms of Peru. Bulletin of the Museum of Comparative Zoology at Harvard College, 52(No. 17) 1910: (321-358). Cil [Zoological Record Volume 47]