@article{苏永春:28, author = {[苏永春, 勾影波]}, title = {东北高寒地区麦田土壤活性有机质和环境因素关系的灰色分析}, publisher = {生态学杂志}, year = {1999}, journal = {生态学杂志}, volume = {}, number = {6}, eid = {28}, pages = {28-32}, keywords = {}, url = http://www.cje.net.cn/CN/abstract/article_19200.shtml }