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Multilingual
1
Walpole, Ronald N, 892.2-W219l | University of toronto Press | 1985 892.2-W219l,
2
Freund, John E., 413.8-F889m | Prentice-Hill | 1987 413.8-F889m,
3
Walpole, Ronald E., 413-W219p | Dellen Publishing | 1978 413-W219p,
4
Walpole, Ronald E., 310-W219i | Dellen Publishing | 1982 310-W219i,