Kessel, R G Cytodifferentiation and vitellogenesis during oogenesis in arachnida: Cytological studies on developing oocytes of a harvestman. [electronic resource] - Journal of morphology Feb 1980 - 175-190 p. digital Publication Type: Journal Article ISSN: 1097-4687 Standard No.: 10.1002/jmor.1051630206 doi