X-Ray study of echinoderm skeletons X-Ray study of echinoderm skeletonsv. 68296–297Pawson, David L. and Donnay, D. H. 1970. "X-Ray study of echinoderm skeletons." Carnegie Institution of Washington Yearbook, 68 296–297.More...ID: 13932Type: articleKeywords: NH-Invertebrate Zoology; si-staff; NMNH