TY - GEN AU - VON MAGNUS,P TI - Propagation of the PR8 strain of influenza A virus in chick embryos. IV. Studies on the factors involved in the formation of incomplete virus upon serial passage of undiluted virus SN - 0365-5555 PY - 2004///0215 KW - Animals KW - Chick Embryo KW - Defective Viruses KW - Influenza A virus KW - Orthomyxoviridae KW - Reproduction KW - Serial Passage KW - Viruses N1 - Publication Type: Journal Article ER -