Новосибирские учёные работают с вирусом Марбург, который ВОЗ назвал опасным

The children's book ‒ is the handwork demanding big sincere devotion. Besides, it is required ‒ to feel preliminary work the text, a material, to enter an era, to sit in library, to rummage in archive. It is important not to be mistaken in details