The previous page is sending you to http://interneturok.ru/ru/school/physics/11-klass/fizika-atomnogo-jadra/biologicheskoe-deystvie-radioaktivnyh-izlucheniy-ekspozitsionnaya-i-pogloschennaya-dozy-izlucheniya-metody?seconds=0&chapter_id=875.

 If you do not want to visit that page, you can return to the previous page.