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61
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62
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63
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64
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65
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66
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67Published 1986“...HT 175 .R562...”
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68
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69
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70
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71Published 1988“...HQ 1090.7 .N5 .O58...”
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72Published 1979“...HD 58.8 .P419...”
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73
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74
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75
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76Published 1979“...HN 385.5 .S678...”
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77
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78Published 1988“...HT 371 .B979...”
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79Published 1988“...HN 710 .Z9 .C6 .R288...”
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80