- A six-part PDF series titled “Spaceport” (1979) by Kingsbury & Arnold, originally published in Analog magazine, was shared in its entirety: http://sacl5.org/images/Spaceport_Part_1a.pdf through Part_2c.pdf.  
- The documents appear to be a detailed, early design study for a reusable spaceport infrastructure, offering historical insight into 1970s-era concepts for lowering launch costs and supporting routine orbital access.