
© UNESCO

| Issue | Title | Tags | |
|---|---|---|---|
| April 1971 | What future for futurology? | ||
| April 1972 | How to save your heart | ||
| April 1973 | Copernicus: a new vision of the universe | Astronomy | |
| April 1974 | Archaeology and art of Albania, Ecuador, China, Bulgaria | albania, Ecuador, China | |
| April 1975 | Sahel: land of no return? | drought | |
| April 1976 | The World of humour, or, The Importance of not being earnest | ||
| April 1977 | Flood-tide or balanced flow? A world debate on information | Access to information, Freedom of Expression, Mass media | |
| April 1978 | Aviation at age 75 | ||
| April 1979 | The Arms race | ||
| April 1980 | Highlands and islands: ecosystems in danger | ecosystems, mountains |