World Meteorological Organization (WMO) upper air network requirements for numerical weather prediction, 1960

World Meteorological Organization (WMO) upper air network requirements for numerical weather prediction, 1960, - 06 PDT 5 Sub- 4 Box 17 Folder 12, Box: 17, Folder: 12. Philip Duncan Thompson Papers, - 06-PDT. National Center for Atmospheric Research (NCAR) Archives. https://aspace.archives.ucar.edu/repositories/2/archival_objects/1701 Accessed December 19, 2025.