@article{Steer_1959, title={The Nature and Purpose of the Expansions on the Antonine Wall}, volume={90}, url={http://journals.socantscot.org/index.php/psas/article/view/8525}, DOI={10.9750/PSAS.090.161.169}, journal={Proceedings of the Society of Antiquaries of Scotland}, author={Steer, Kenneth}, year={1959}, month={Nov.}, pages={161-169} }