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1by National Science Foundation (U.S.). Office of Polar Programs, National Science Foundation (U.S.). Division of Polar Programs“...[Washington, D.C.] : National Science Foundation [Division of Polar Programs : Supt. of Docs., U.S...”
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2by National Science Foundation (U.S.). Division of Polar Programs.“...Washington, D.C. : National Science Foundation, Division of Polar Programs : For sale by the Supt...”
Published 1984
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3by National Science Foundation (U.S.). Division of Polar Programs“...Washington, D.C. : National Science Foundation, Division of Polar Programs : For sale by the Supt...”
Published 1990
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