Stoilova, I., Popivanova, N., Petrova, N. Concerning the prevalence of hepatits a viral infection,
, 2002, 5-7.
Stoilova, I., Popivanova, N., Petrova, N. .
Concerning the prevalence of hepatits a viral infection.
Sofia: , 2002, 5-7.
Stoilova, I., Popivanova, N., Petrova, N. (2002)
Concerning the prevalence of hepatits a viral infection,
Sofia: , 5-7
Stoilova, I.,
Popivanova, N., &
Petrova, N.
(2002).
Concerning the prevalence of hepatits a viral infection. Problems of infectious and parasitic diseases. Sofia: 30 (1), 5-7.