@misc{oai:tsukuba.repo.nii.ac.jp:00010937,
 author = {An, Tai-xiang and 安, 太庠},
 month = {},
 note = {1993, 【要旨】},
 title = {Conodonts and conodont biostratigraphy of the middle and upper ordovician in north china},
 year = {1993}
}