@article{ZHANG Lijuan_448, author = {ZHANG Lijuan, JIANG Lanqi, ZHANG Xuezhen, ZHANG Ankang, JIANG Chunyan}, title = {Reconstruction of cropland over Heilongjiang Province in the late 19th century}, publisher = {Acta Geographica Sinica}, year = {2014}, journal = {Acta Geographica Sinica}, volume = {69}, number = {4}, eid = {448}, pages = {448-458}, keywords = {Heilongjiang Province;cropland area;late 19th century;agricultural suitability index (ASI)}, doi = https://www.geog.com.cn/EN/10.11821/dlxb201404002 }