Statistical yearbook / United Nations ; 62nd issue (2019).
ST ESA STAT / S ; 38
Statistical yearbook / United Nations ; 63rd issue (2020).
ST ESA STAT / S ; 39
Payload Flight Opportunities for Developing Countries
... Inland transport statistics for Europe and North America
The general utility and character of prospective navigation services satellite systems.
NASA programs and opportunities for international cooperation in space.
Spacecraft oceanography - Its scientific and economic implications for the next decade.
... Inland transport statistics for Europe and North America
SafeFITS : safe future inland transport systems
Annual bulletin of transport statistics for Europe and North America