Mishra, A K Scanning electron microscopy of the spines of the tunic of the ascidian, Boltenia ovifera. [electronic resource] - Canadian journal of zoology May 1970 - 475-7 p. digital Publication Type: Journal Article ISSN: 0008-4301 Standard No.: 10.1139/z70-080 doi Subjects--Topical Terms: AnimalsInvertebrates--cytologyMicroscopy, Electron, Scanning