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21Published 1974“...HD 6055 .S678...”
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22
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23Published 1983“...HD 8930.5 .M961...”
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24Published 1977“...HD 6276 .N5 .H638...”
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25Published 1983“...HD 6220.4 .W872...”
Conference Proceeding Book -
26
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27
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28
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29
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30
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31
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32Published 1977“...HD 6053 .N532...”
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33
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34Published 1976“...HQ 710 .S678...”
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35
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36
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37
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38
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39Report of the working party on research into employment with special emphasis on youth unemployment.Published 1981“...HD 5850 .N5 .W926...”
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40