Quantitative studies of oncornaviruses in thin sections.

Adenoviridae/isolation & purification Animals Centrifugation, Density Gradient Filtration Gammaretrovirus/isolation & purification Histological Techniques Humans Mammary Tumor Virus, Mouse/isolation & purification Methods Mice Micropore Filters Microtomy Milk/microbiology Milk, Human/microbiology Regression Analysis Sarcoma/microbiology Vaccinia virus/isolation & purification