title: The ultrastructural basis for the identification of cell types in the pancreatic islets. I. Guinea pig.
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D003593:Cytoplasm; D006168:Guinea Pigs; D066298:In Vitro Techniques; D007515:Islets of Langerhans / Q000166:cytology*; D008854:Microscopy, Electron; D010784:Photomicrography; D013194:Staining and Labeling