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Wilkie , James W., 342.8-W683m
| California press |
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Williams, Roger L., 371.01-W726o
| Pennsylvania State University Press |
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Clark, John G, 572.5-C592e
| University of Illinois |
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McCool, Daniel, 321.33-M478c
| University of California |
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Carter, Stephen L, 334-C323c
| Basic Books |
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US Department of Education
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