| Iowa - 1980 - 784 halaman
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| Iowa - 1979 - 684 halaman
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| Iowa - 1978 - 1056 halaman
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| Iowa - 1977 - 758 halaman
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| Iowa - 1976 - 960 halaman
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| Iowa - 1975 - 720 halaman
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| Iowa - 1974 - 1122 halaman
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| Iowa - 1973 - 794 halaman
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| Iowa - 1972 - 692 halaman
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| Iowa - 1971 - 668 halaman
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