@article{申元村_221, author = {[申元村, 谢向荣, 杨柳林]}, title = {北京市昌平县土地类型及农业区划问题}, publisher = {地理科学}, year = {1982}, journal = {地理科学}, volume = {2}, number = {3}, eid = {221}, pages = {221-231,292}, keywords = {}, doi = http://geoscien.neigae.ac.cn/CN/10.13249/j.cnki.sgs.1982.03.221 }