| title | ISBN-13 (ISBN-10)  | year of publica- tion  | other author(s) | 
|---|---|---|---|
| Surveys of Economically Active Population, Employment, Unemployment and Underemployment: An I.L.O. Manual of Concepts and Methods | 978-92-2-1O6516-6 (92-2-1O6516-2)  | 1991 | Ralf Hussmanns · etc. · V. Verma |