title: Researches on the endocrine pancreas ultrastructure in the drog Rana Ridibunda.
mesh_terms: D000818:Animals; D001001:Anura / Q000033:anatomy & histology*; D003594:Cytoplasmic Granules; D006652:Histological Techniques; D007515:Islets of Langerhans / Q000166:cytology*; D008854:Microscopy, Electron