?
4
A spatial model (SWAM) for water efficiency and irrigation ..
a case study from Northwestern China
Farming & rural systems economics ; Vol. 53
?
5
International trade, learning, and firms' heterogeneous per..
theory and evidence from developing economies
?
7
Konzepte zur Wasserversorgung und Abwasserentsorgung für v..
Gewässerschutz, Wasser, Abwasser ; 203