{"id":"003053335","type":"article","title":"Excavations in passage-graves and ring-cairns of the Clava Group","publisher":"National Museum of Antiquities of Scotland","publisher-place":"Edinburgh","pages":"173-207","container-title":"Proceedings of the Society of Antiquaries of Scotland, 88 (1954-1956","author":[{"family":"Piggott","given":"Stuart 1910-1996"}],"issued":{"raw":"1956"}}