title: Ultrastructure of pulmonary tumors induced in rats by N-nitrosomethylurethane.
mesh_terms: D000236:Adenoma / Q000139:chemically induced / Q000648:ultrastructure*; D000818:Animals; D005260:Female; D008175:Lung Neoplasms / Q000139:chemically induced / Q000648:ultrastructure*; D008854:Microscopy, Electron; D009605:Nitrosomethylurethane / Q000633:toxicity*; D051381:Rats; D011916:Rats, Inbred F344; D014520:Urethane / Q000031:analogs & derivatives*
chemical_list: D014520:Urethane; D009605:Nitrosomethylurethane