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11
Paquette, Leo A, 431.1-P219p | Benjamin Cummings Publishing Company | 1981 431.1-P219p,
12
Gray, Harry B, 431.14-G778c | Benjamin Cummings Publishing Company | 1982 431.14-G778c,
13
Mathews, Jon, 414-M429m | Benjamin Cummings Publishing Company | 1983 414-M429m,