title: Some remarks on the morphology of virus particles of the B type and their isolation from mammary tumors.
mesh_terms: D000818:Animals; D002499:Centrifugation, Density Gradient; D003973:Diatrizoate; D005260:Female; D008321:Mammary Glands, Animal / Q000382:microbiology; D008325:Mammary Neoplasms, Experimental / Q000382:microbiology*; D008324:Mammary Tumor Virus, Mouse / Q000302:isolation & purification*; D008722:Methods; D051379:Mice; D008854:Microscopy, Electron
chemical_list: D003973:Diatrizoate