1. Status of the NASA continuing investigation of catastrophic balloon failures;Needleman;Adv. Space Res.,1987
2. Recent materials problems relating to catastrophic balloon failures;Smith;Scientific Ballooning,1985
3. I.S. Smith, Jr., NASA balloon design and flight: philosophy and criteria, this issue.
4. W.L. Craddock, Jr., D.W. Stuchlik, NASA Long Duration Balloon capability development project, this issue.
5. G.R. Conrad, Recent refinements and increased capabilities in balloon vertical performance analysis, this issue.