TY - RPRT TI - A sensitive method for quantification of vesicular stomatitis virus defective interfering particles: focus forming assay. AU - T R Winship AU - H R Thacore PY - 1980 DO - 10.1099/0022-1317-48-1-237 UR - https://pubmed.ncbi.nlm.nih.gov/6247438/ ID - 6247438 ER -