ISBN: 978-92-2-102764-5
ISBN-10: 92-2-102764-3
International Labour Office ยท 1981
| See also: | ||
| 1991 | Paperback | Report |
| 1990 | Unknown Binding | Report |
| 1990 | Unknown Binding | Report |
| 1990 | Unknown Binding | Report |
| 1984 | Paperback | Report |
| 1983 | Paperback | Report |
| 1980 | Paperback | Report |
| 1980 | Paperback | Report |
| 1979 | Paperback | Report |
| 1978 | Paperback | Report: 1977 12th |
| 1978 | Unknown Binding | Report |
| 1971 | Unknown Binding | Report |