نبذة مختصرة : No. 7 issued as Ohio State University. Columbus. Institute of Polar Studies, Report, no. 20. ; Mode of access: Internet. ; Issued by U.S. Quartermaster Research and Engineering Center, Earth Sciences Division, 1961-62; 1963-66, U.S. Army Natick Laboratories. Earth Sciences Division; 1967-71, Earth Sciences Laboratory; Nov. 1971- , Geographic Sciences Laboratory. Earth Sciences Division.
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