ISBN: 978-92-2-101898-8
ISBN-10: 92-2-101898-9
International Labour Office ยท 1977
| See also: | ||
| 1992 | Paperback | Note on the proceedings |
| 1982 | Unknown Binding | Note on the proceedings |
| 1982 | Paperback | Note on the proceedings |
| 1980 | Paperback | Note on the proceedings |
| 1979 | Paperback | Note on the proceedings |