Sample selection bias in visitor surveys: comparative results of an on-site and an off-site survey assessing recreational benefits of forests
Bernath, K., & Roschewitz, A. (2006). Sample selection bias in visitor surveys: comparative results of an on-site and an off-site survey assessing recreational benefits of forests. In D. Siegrist, C. Clivaz, M. Hunziker, & S. Iten (Eds.), Exploring the nature of management. Proceedings of the third international conference on Monitoring and Management of Visitor flows in recreational and protected areas. Rapperswil, Switzerland. 13-17 September 2006 (pp. 381-382). University of Applied Sciences Rapperswil.