(Q67508518)
Statements
Placebo-controlled efficacy study of hepatitis A vaccine in Valdivia, Chile (English)
S. Riedemann
G. Reinhardt
G. G. Frösner
H. Ibarra
L. Moraleda
V. Hering
F. Siegel
C. Toledo
J. Leon
J. L. Gonzalez
1 January 1992