TY  - SER
AU  - Bluemling, Bettina
AU  - Yang, Hong
AU  - Pahl-Wostl, Claudia
TI  - Making Water Productivity Operational-a Concept of Agricultural Water Productivity Exemplified at a Wheat-Maize Cropping Pattern inNorth China Plain
KW  - Water Productivity
KW  - Water Policy
KW  - North China Plain
ER  -