1) Study on the Currency of Yuan Round Coin
垣字圜钱地望考辨
2) round currency text
圜钱文字
3) round-coin
圜钱
1.
There are certain similarity in such aspects as the form,characters of the round-coin with a square hole which Yan and Qi cast in the later period of the Warring States,the connection of the round-coin between two countries was close.
战国晚期燕国和齐国铸行的方孔圆钱在形制、钱文等方面有着诸多相似之处,二国之圜钱联系密切。
4) Gong Gong Clan s Geographic Location
共工氏地望考辨
5) Study on the Geographical Position of Ancient Xiakou
古夏口城地望考辨
补充资料：觚圜
1.方圆。
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参考词条