C-type Virus Particles in Pig Kidney Cell Lines Armstrong, J. A. and Porterfield, J. S. and de Madrid, Ana Teresa,, 10, 195-198 (1971), doi = https://doi.org/10.1099/0022-1317-10-2-195, publicationName = Microbiology Society, issn = 0022-1317, abstract= , language=, type=