Number 11 (Jan.-June 1974) in English, French, Spanish, Russian. - Number 12 (July-Dec. 1974) in English, Spanish, Russian. - Number 13 (Jan.-June 1975) in English, French, Spanish, Russian. - Number 14 (June-Dec. 1975) in English, French, Spanish, Russian. - Number 15 (Jan-June 1976) in English, French, Spanish, Russian.