| Citation | National Audubon Society Nature Guide - Pacific Ocean 2006 Chitons. Placiphorella velata, Nuttalina californica, and Cryptochiton stelleri. http://library.thinkquest.org/15931/shells/shells52.html[accessed27/01/06] |
| DOI / ISBN | |
| Paper URL | |
| Ref. No. | 314 |
| Language | English |
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