@article{Ritchie_1917, title={Notes on some Stone Circles in Central Aberdeenshire}, volume={51}, url={http://journals.socantscot.org/index.php/psas/article/view/7406}, DOI={10.9750/PSAS.051.30.47}, journal={Proceedings of the Society of Antiquaries of Scotland}, author={Ritchie, James}, year={1917}, month={Nov.}, pages={30-47} }