[Further investigations on the Hertfordshire strain of attenuated vaccine-virus].
D006801:Humans; D011200:Poultry; D014611:Vaccination; D014612:Vaccines; D014613:Vaccines, Attenuated
D014612:Vaccines; D014613:Vaccines, Attenuated
FOWLS, DOMESTIC; VACCINES AND VACCINATION
Ulteriori ricerche sul vaccino-virus attenuato ceppo Hertfordshire.