Eckelbarger, Kevin J Structure of the ovotestis and evidence for heterosynthetic incorporation of yolk precursors in the oocytes of the nudibranch mollusc, Spurilla neapolitana. [electronic resource] - Journal of morphology Aug 1989 - 105-118 p. digital Publication Type: Journal Article ISSN: 1097-4687 Standard No.: 10.1002/jmor.1052010202 doi