1. Design verification of the IID-7A balloon;Air Force;ETR-Range Measurements Laboratory Rep No. TR74-058,1974
2. A summary of tethered lighter than air development conducted by the range measurements laboratory;Air Force;Rep. TELTA TR. No. 74-065,1974
3. All American Engineering Corporation data.
4. Economics of modern long haul cargo airships;Ardema,1977