يعرض 1 - 20 نتائج من 56 نتيجة بحث عن '"Roelofs, Robert"', وقت الاستعلام: 0.62s تنقيح النتائج
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    Patent
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    Academic Journal
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    Patent
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    Patent
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    Patent
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    Patent
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    Patent
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    Patent
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    Patent
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    Academic Journal
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    Patent
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    Patent
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    Patent
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    Academic Journal
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    Academic Journal
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    Academic Journal
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    Academic Journal

    المصدر: Journal of Teacher Education ; volume 16, issue 1, page 103-108 ; ISSN 0022-4871 1552-7816

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    Academic Journal
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    Academic Journal
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    Academic Journal