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1
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2
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3Llyfrgan Sutton, Richard Manliffe, 1900-1966“...American Association of Physics Teachers...”
Cyhoeddwyd 1938
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4LlyfrCyhoeddwyd 1970“...American Association of Physics Teachers...”
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5Llyfrgan Brown, Thomas Benjamin, 1892-“...American Association of Physics Teachers...”
Cyhoeddwyd 1959
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6LlyfrCyhoeddwyd 1965“...American Association of Physics Teachers...”
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7LlyfrCyhoeddwyd 1973“...American Association of Physics Teachers...”
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8LlyfrCyhoeddwyd 1982“...American Association of Physics Teachers...”
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9LlyfrCyhoeddwyd 1966“...American Association of Physics Teachers. Committee on Resource Letters...”
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10LlyfrCyhoeddwyd 1966“...American Association of Physics Teachers. Committee on Resource Letters...”
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11LlyfrCyhoeddwyd 1963“...American Association of Physics Teachers...”
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12LlyfrCyhoeddwyd 1965“...American Association of Physics Teachers...”
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13LlyfrCyhoeddwyd 1963“...American Association of Physics Teachers. Committee on Resource Letters...”
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14LlyfrCyhoeddwyd 1965“...American Association of Physics Teachers...”
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15LlyfrCyhoeddwyd 1965“...American Association of Physics Teachers...”
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16LlyfrCyhoeddwyd 1963“...American Association of Physics Teachers...”
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17LlyfrCyhoeddwyd 1963“...American Association of Physics Teachers...”
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18LlyfrCyhoeddwyd 1963“...American Association of Physics Teachers...”
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19LlyfrCyhoeddwyd 1965“...American Association of Physics Teachers...”
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20LlyfrCyhoeddwyd 1965“...American Association of Physics Teachers...”