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21
Thomson, W T, 521.3-T482a | Thomson Publications | 1985 521.3-T482a,
22
Thomson, W T, 521.3-T482a | Thomson Publications | 1986 521.3-T482a,
23
Thomson, A J., 745-T482p | Oxford University Press | 1985 745-T482p,
24
Thomson, William T, 424.01-T486t | Prentice Hall | 1981 424.01-T486t,