%0 Journal Article %A R. I. McCallum %T Proceedings of the Fourth International Congress on Hyperbaric Medicine %D 1972 %R 10.1136/oem.29.2.232 %J British Journal of Industrial Medicine %P 232-232 %V 29 %N 2 %U https://oem.bmj.com/content/oemed/29/2/232.1.full.pdf