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61Published 1940“...HC 622 .N532 car...”
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62Published 1990“...HC 681 .Z9 .E5 .R336...”
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63Published 1993“...HV 1559 .N5 .I615...”
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64
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65
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66Published 1993“...HC 663.5 .R3365...”
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67
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68Published 1991“...HD 8930.5 .C968...”
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69Published 1971“...HC 622 .N277 r addendum 3...”
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70Published 1975“...HD 2195.6 .S471...”
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71
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72Published 1970“...HV 483 .N532 c...”
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73Published 1990“...HD 5850.52 .A6 .K58...”
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74Published 1991“...HD 7106 .N5 .C748 1st...”
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75Published 1972“...HV 482 .N532...”
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76Published 1989Conference Proceeding Book
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77Published 1992“...HF 3230.5 .A46 .F714...”
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78Published 1970“...HC 622 .N277 r...”
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79Published 1969“...HC 622 .N277 fo...”
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80