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1
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2
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3gan Augsburg, De Rosco Leo, b. 1859Pynciau “...Drawing Study and teaching (Elementary)...”
Cyhoeddwyd 1910
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4
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5gan Vinall, J. W. TophamPynciau “...Drawing Study and teaching (Elementary)...”
Cyhoeddwyd 1910
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6gan Colgan, TrevorPynciau “...Map drawing Study and teaching (Elementary)...”
Cyhoeddwyd 2000
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7gan McLean, Kirsty, 1968-Pynciau “...Drawing Study and teaching (Elementary)...”
Cyhoeddwyd 1999
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8