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	People still awaiting the Gospel message were the special object of Don Bosco’s concern and apostolic effort. Don Bosco sent his first missionaries to Argentina in 1875. From there they spread throughout South America. The Salesians today serve youth in nearly 130 countries in the 5 continents.   Don Bosco Mission Office in Canada It is a registered charitable organization authorized by the Canadian government to issue income tax receipts. It keeps contact with dozens of missionaries throughout the world and serves as a bridge between the generosity of people here and the crying necessities of people in developing countries.   Mother M.D. Mazzarello Mission Office It is the  Mission Office of the Salesian Sisters, officially known as the Daughters of Mary Help of Christians.