title: Quantitative studies of oncornaviruses in thin sections.
mesh_terms: D000256:Adenoviridae / Q000302:isolation & purification; D000818:Animals; D002499:Centrifugation, Density Gradient; D005374:Filtration; D017988:Gammaretrovirus / Q000302:isolation & purification*; D006652:Histological Techniques; D006801:Humans; D008324:Mammary Tumor Virus, Mouse / Q000302:isolation & purification; D008722:Methods; D051379:Mice; D008851:Micropore Filters; D008867:Microtomy; D008892:Milk / Q000382:microbiology; D008895:Milk, Human / Q000382:microbiology; D012044:Regression Analysis; D012509:Sarcoma / Q000382:microbiology; D014616:Vaccinia virus / Q000302:isolation & purification