Design and implementation of a grassland resource management information system in northern China

• Jian-peng Yin, 
• Jin-long Gao, 
• Qi-sheng Feng, 
• Jing Ge, 
• Meng-jing Hou, 
• Bao-ping Meng, 
• Shu-xia Yang, 
• Tian-gang Liang