[Immunobiological relations of various strains of variola virus isolated from birds].
D000818:Animals; D001717:Birds; D008460:Meat; D011200:Poultry; D012899:Smallpox; D012901:Variola virus
BIRDS; FOWLS, DOMESTIC; SMALLPOX/virus
Relaţiile imunobiologice dintre diferitele tulpini de virus variolic izolate de la p�as�ari.