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21Published 1988“...HD 59.6 .N5 .G946...”
Book -
22
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23
-
24
-
25
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26
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27Published 1991“...HF 5500.3 .N5 .S898...”
Serial -
28
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29Published 1986“...HG 3530.5 .A8 .N567 .B0661 1986...”
Book -
30
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31Published 1994“...HC 60 .O96 og 1994...”
Book -
32Published 1994“...H 62.5 .N5 .F494...”
Book -
33
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34Published 1993“...HD 9674 .N52 .I62...”
Book -
35Published 1993“...HD 1120.5 .A658...”
Book -
36
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37Published 1990“...HQ 809.3 .N5 .R281...”
Book -
38
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39
-
40