Critical issues in materials and mechanical engineering : proceedings of the Symposium on Critical Materials and Fabrication Issues for pressure vessels, piping, pumps, and valves : presented at the Pressure Vessels & Piping Conference of the centennial celebration of the American Society of Mechanical Engineers, San Francisco, California, August 12-15, 1980 / sponsored by the Pressure Vessels and Piping Division, ASME ... [et al.], in collaboration with American Society for Nondestructive Testing (ASNT)... [et al.] ; edited by Jeffrey T. Fong ... [et al.].