@article{余庆余_1, author = {[余庆余, 蒋柱中, 艾南山]}, title = {水系分布方向计算的密集度方法}, publisher = {地理科学}, year = {1985}, journal = {地理科学}, volume = {5}, number = {1}, eid = {1}, pages = {1-9}, keywords = {}, doi = http://geoscien.neigae.ac.cn/CN/10.13249/j.cnki.sgs.1985.01.1 }