| Taphonomy and paleoecology of Villamil fossil megagastropods of Isla Isabela |
| Walker, S.E. (1991). Taphonomy and paleoecology of Villamil fossil megagastropods of Isla Isabela, in: James, M.J. (1991). Galápagos marine invertebrates: taxonomy, biogeography, and evolution in Darwin's islands. Topics in Geobiology, 8: pp. 423-437 |
| In: James, M.J. (1991). Galápagos marine invertebrates: taxonomy, biogeography, and evolution in Darwin's islands Topics in Geobiology, 8 Plenum: New York. ISBN 0-306-43794-5. xiv, 474 pp., meer |
| In: Topics in Geobiology. Plenum: New York. ISSN 0275-0120, meer |
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