# Chi-hsien

> 1:250,000 China topographic series map (L500 NI50-1) produced by the Army Map Service, 12/1957

**Wikidata**: [Q99436620](https://www.wikidata.org/wiki/Q99436620)  
**Source**: https://4ort.xyz/entity/chi-hsien


## References

1. [Source](http://id.lib.harvard.edu/alma/990094028280203941/catalog)
2. [Source](http://id.lib.harvard.edu/fgdc/AMS7810_S250_U54_NI50_1/catalog)