title: Electron microscopic demonstration of an extracellular duplex lining layer of alveoli.
mesh_terms: D000818:Animals; D004847:Epithelial Cells; D006652:Histological Techniques; D010743:Phospholipids; D011506:Proteins; D011650:Pulmonary Alveoli / Q000166:cytology*; D051381:Rats
chemical_list: D010743:Phospholipids; D011506:Proteins