1. Case 5 the stricture appeared to be just a fibrous;Dark, J.; Jewsbury, P.;Thorax,1955
2. Fowler, A. W. (1955). Brit. med. J., 1, 85.
3. Griffith, J. L. (1949). Thorax, 4, 105.
4. Jackson, J. W., Jones, P. H., and Sellors, T. H. (1955). Ibid., 10, 229.
5. revealed an atelectatic lung completely cut;off Kinsella, T.J.; Johnsrud, L.W.;J. thorac. Surg,1947