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1LlyfrCyhoeddwyd 1981“...World Meteorological Organization...”
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2LlyfrCyhoeddwyd 1964“...World Meteorological Organization...”
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3CylchgrawnCyhoeddwyd 1975“...World Meteorological Organization...”
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4LlyfrCyhoeddwyd 1962“...World Meteorological Organization...”
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5LlyfrCyhoeddwyd 1979“...World Meteorological Organization...”
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6LlyfrCyhoeddwyd 1971“...World Meteorological Organization...”
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7Llyfrgan Landsberg, H. E. (Helmut Erich), 1906-“...World Meteorological Organization...”
Cyhoeddwyd 1958
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8LlyfrCyhoeddwyd 1968“...World Meteorological Organization...”
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9LlyfrCyhoeddwyd 1973“...World Meteorological Organization...”
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10
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11
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12
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13CylchgrawnCyhoeddwyd 1961“...World Meteorological Organization...”
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14LlyfrCyhoeddwyd 1969“...World Meteorological Organization...”
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15LlyfrCyhoeddwyd 1978“...World Meteorological Organization...”
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16LlyfrCyhoeddwyd 1978“...World Meteorological Organization. Panel of Experts on Meteorological Education and Training...”
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17Llyfrgan Stern, R. D.“...World Meteorological Organization. Programme on Research in Tropical Meteorology...”
Cyhoeddwyd 1983
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18LlyfrCyhoeddwyd 1977“...World Meteorological Organization. Panel of Experts on Education and Training...”
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19
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20LlyfrCyhoeddwyd 1974“...World Meteorological Organization...”