TY - GEN AU - Morrow,A W TI - Concentration of the virus of foot and mouth disease by foam flotation SN - 0028-0836 PY - 1969///0805 KW - Aphthovirus KW - isolation & purification KW - Methods N1 - Publication Type: Journal Article UR - https://doi.org/10.1038/222489a0 ER -