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61
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62
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63
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64by Rogers, Charles E. (Charles Elkins), 1892-1978Subjects: “...Occupations....”
Published 1937
Book -
65
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66by Wellemeyer, J. F. (John Fletcher), 1913-Subjects: “...Occupations Classification....”
Published 1953
Book -
67
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68
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69
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70
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71
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72
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73
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74by Paterson, Donald G. (Donald Gildersleeve), 1892-1961Subjects: “...Occupations Classification....”
Published 1953
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75Published 1957Subjects: “...Occupations....”
Book -
76
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77
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78
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79
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80