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61
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62
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63
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64
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65by Waugh, Frederick V. (Frederick Vail), 1898-1974“...University of Minnesota Press,...”
Published 1984
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66
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67
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68by Beals, Ralph L. (Ralph Leon), 1901-1985“...University of Minnesota Press,...”
Published 1957
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69Published 1976“...University of Minnesota Press,...”
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70by Cochrane, Willard W. (Willard Wesley), 1914-2012“...University of Minnesota Press,...”
Published 1976
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71
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72
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73
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74
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75
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76Published 1980“...University of Minnesota Press,...”
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77
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78
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79Published 1965“...University of Minnesota Press,...”
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80