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Multilingual
1
Papadimitriou, Dimitri B, 327.5-P213s | MacMillan Press:St. Martin's Press | 1996 327.5-P213s,
2
Lewis, Harry R., 410.1-L674e | Prentice Hall | 1981 410.1-L674e,
3
Papadimitriou, Christos H., 413-P213c | Prentice-Hill | 1982 413-P213c,