Feng, Hongli; Kurkalova, Lyubov A.; Kling, Catherine L.; … - 2004 - [Elektronische Ressource]
Center for Agricultural and Rural Development
Iowa State University
Ames, Iowa 50011-1070
www … Division, Center for Agricultural and Rural Development,
Iowa State University.
This paper is available online on the CARD … authors.
For questions or comments about the contents of this paper, please contact Hongli Feng, 560D
Heady Hall, Iowa …