Home › Authors › Institutes for Environmental Research 👤 Institutes for Environmental Research 4 books Books by Institutes for Environmental Research Application of numerical metho Application of numerical methods of mapping to astronomical surface photometry 1967 Interference predictions for V Interference predictions for VHF/UHF air navigation aids 1967 Nitrogen ions in the upper atm Nitrogen ions in the upper atmosphere 1967 Project ECCRO Project ECCRO 1967