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1Aldizkako argitalpena
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2LiburuaArgitaratua 1975“...Canada. Environment Canada...”
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3
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4Liburuanork Sewell, W. R. Derrick“...Canada. Environment Canada. Advanced Concepts Centre...”
Argitaratua 1976
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5Government Document LiburuaArgitaratua 1984“...Canada. Environment Canada...”
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6Government Document LiburuaArgitaratua 1982“...Canada. Environment Canada...”
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7Government Document LiburuaArgitaratua 1983“...Canada. Environment Canada...”
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8Liburuanork Galtung, Johan“...Canada. Environment Canada. Advanced Concepts Centre...”
Argitaratua 1978
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9Government Document Liburuanork Thirumurthi, D.“...Canada. Environment Canada...”
Argitaratua 1981
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10Government Document LiburuaArgitaratua 1979“...Canada. Environment Canada...”
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11Conference Proceeding LiburuaArgitaratua 1986“...Canada. Environment Canada...”