'Span. missionaries in Peru found a substance in the bark of the Cinchona tree that treats this disease'
malaria
MEDICINAL PLANTS: Span. missionaries in Peru found a substance in the bark of the Cinchona tree that treats this disease
Span. missionaries in Peru found a substance in the bark of the Cinchona tree that treats this disease
Span. missionaries in Peru found a substance in the bark of the Cinchona tree that treats this disease
MEDICINAL PLANTS
malaria
MEDICINAL PLANTS