. 1917 Jun;3(6):401–404. doi: 10.1073/pnas.3.6.401
New Analyses of Echinoderms
F W Clarke
1, R M Kamm
1
1United States Geological Survey, Washington1
1
This paper is here published by permission of the Director of the United States Geological Survey.
PMCID: PMC1091269 PMID: 16576226