@Article{MC-9-3, author = {}, title = {历史照片}, journal = {数学文化}, year = {2018}, volume = {9}, number = {3}, pages = {0--0}, abstract = {}, issn = {2617-8656}, doi = {https://doi.org/2018-MC-12636}, url = {https://global-sci.com/article/89485/%E5%8E%86%E5%8F%B2%E7%85%A7%E7%89%87} }