Callander, J. “Notice of (1) Three Stone Cups Found in a Cairn in Aberdeenshire, and (2) a Short Cist Containing a Beaker Urn Found at Boglehill Wood, Longniddry, East Lothian”. Proceedings of the Society of Antiquaries of Scotland 50 (November 30, 1916): 145-151. Accessed March 29, 2024. http://soas.is.ed.ac.uk/index.php/psas/article/view/7380.