# Offa’s Dyke: A Field Survey of the Western Frontier of Mercia in the Seventh and Eighth centuries AD

> book published in 1955

**Wikidata**: [Q65515821](https://www.wikidata.org/wiki/Q65515821)  
**Source**: https://4ort.xyz/entity/offa-s-dyke-a-field-survey-of-the-western-frontier-of-mercia-in-the-seventh-and-eighth-centuries-ad