ISBN: 978-92-2-101785-1
ISBN-10: 92-2-101785-0
International Labour Office · 1977
| See also: | ||
| 1976 | Paperback | General report |
| 1976 | Unknown Binding | General report |
| 1976 | Unknown Binding | General report |
| 1975 | Paperback | General report |
| 1975 | Unknown Binding | General report |
| 1974 | Paperback | General report |