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2gan Blomfield, LaurencePynciau “...Earth sciences Study and teaching (Elementary)...”
Cyhoeddwyd 1997
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3gan Beals, Graeme, 1954-Pynciau “...Earth sciences Study and teaching (Elementary)...”
Cyhoeddwyd 1994
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15Cyhoeddwyd 1999Pynciau “...Social sciences Problems, exercises, etc. Juvenile literature...”
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20Cyhoeddwyd 2001Pynciau “...Social sciences Study and teaching (Primary) New Zealand....”
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