1. 3) A. R. Duffy: Full-scale Studies, Proc. of Symposium on Line Pipe Research, AGA Catalogue No.L30000, 1965, 43-82.
2. 4) A. R. Duffy: Studies of Hydrostatic Test Levels and Defect Behavior, Proc. of Symposium on Line Pipe Research, AGA Catalogue No.L30000, 1965, 139-160.
3. 5) R. J. Eiber: Fracture Propagation, Paper I, Proc. of 4th Symposium on Line Pipe Research, AGA Catalogue No.L30075, 1969.