TY  - BOOK
AU  - van,Ark Bart
AU  - Broersma,Lourens
AU  - de,Jong Gjalt
TI  - Innovation in Services, Overview of Data Sources and  Analytical Structures
T2  - Research Memorandum
PY  - 1999///
CY  - Groningen
PB  - University of Groningen
ER  -