TY - BOOK TI - Study of the Upper Atmosphere and Near-Earth Space in Polar Regions: Scientific Status and Recommendations for Future Directions DO - 10.17226/19545 PY - 1982 UR - https://nap.nationalacademies.org/catalog/19545/study-of-the-upper-atmosphere-and-near-earth-space-in-polar-regions PB - The National Academies Press CY - Washington, DC LA - English KW - KW - Space and Aeronautics ER -