Photocopy entitled"Estimated Costs - Single Prototype Airships" dated Dec 2, 1948. Two pages, first has columns for K/M/N Ships and rows entitled Envelope Vol/Cost, Car Weight/Cost, Airship Weight/Cost. The second page is a list of notes amplifying the table data. The author was E. Everhart, Jr., Manager of LTA Engr Proj Admin. About good condition.