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21
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22Published 1971“...HD 5660 .N5 .N532 lw...”
Book -
23Published 1980“...HD 9685 .N52 .H236...”
Book -
24
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25
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26
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27Published 1980“...HT 169 .N51 .D285...”
Book -
28
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29
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30
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31
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32Published 1976“...HD 5660 .N5 .N532...”
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33
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34Published 1966“...HD 29 .N532...”
Conference Proceeding Book -
35Published 1983“...HD 9685 .N52 .H236 1983...”
Book -
36
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37Published 1983“...HD 62.7 .S963...”
Book -
38Published 1983“...HD 29 .T673 1983...”
Conference Proceeding Book -
39
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40Published 1975“...HD 5660 .N5 .S471...”
Book