Bracco Industria Chimica Spa, Milan: composition of "Tonobion" and of "Optonicum" requests sent to the Ministry of Health, General Directorate of the Pharmaceutical Service in Rome and to the Interministerial Price Committee, concerning the modification of the composition of the medicinal speciality "Optonicum", and the increase of the selling price; correspondence, in particular with Bracco Delegation of Rome; Ministry of Health;: decree of registration of the medicinal speciality "Tonobion" on microfilm..