This article refers to:
Guo, J., and P. Gong. 2016. “Forest Cover Dynamics from Landsat Time-Series Data Over Yan’an City on the Loess Plateau during the Grain for Green Project.” International Journal of Remote Sensing 37 (17): 4101–4118. http://dx.doi.org/10.1080/01431161.2016.1207264
The authors of the above article advise that there is an error in Table 9, page 4114. The units of the table should be hectares (“ha”), not “×103 ha” as published.