The Postal, Telegraph and Telephone International (PTTI) was a global union federation bringing together unions of communications workers worldwide. (en)
Communications International (CI) was een internationale vakbondsfederatie. (nl)
The Postal, Telegraph and Telephone International (PTTI) was a global union federation bringing together unions of communications workers worldwide. (en)
Communications International (CI) was een internationale vakbondsfederatie. (nl)