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21
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22
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23Published 1970“...HE 5614.5 .N5 .N532...”
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24
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25
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26Published 1994“...HE 297.5 .N532 1994...”
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27Published 1973“...HE 152 .F492...”
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28Published 1991“...HE 297.5 .N532...”
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29
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30
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31Published 1995“...HE 297.5 .T7725...”
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32Published 1995“...HE 368.2 .Z55 .E3 .N277...”
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33Published 1995“...HE 368.2 .Z55 .E3 .N2775...”
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34
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35
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36
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37Published 1996“...HE 368.2 .Z55 .E3 .E61 summary...”
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38Published 1996“...HE 5614.5 .N5 .S1275 summary...”
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39Published 1997“...HE 368.2 .Z55 .E3 .O62...”
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40Published 1989“...HE 5616.5 .N532...”
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