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1
Lewis, Ricki, 472-L675l-R | Wm. C. Brown Publishers | 1992 472-L675l-R,
2
Lewis, Richard J, 430.3-L675h-R | Van Nostrand Reinhold | 1997 430.3-L675h-R,
3
Johnson, W. Lewis, 559.962-J71p-R | the Association for Computing Machinery | 1997 559.962-J71p-R,
4
Blackwell, Lewis, 639-B632i-R | ICEG | 1990 639-B632i-R,