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By Allan G. Bluman
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By Irwin Miller, Marylees Miller, Miller, Irwin, Marylees
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By Colin Robson, Robson, Colin
By Darrell Huff
By Derek Rowntree
By john-allen-paulos, Paulos, John Allen
By Malcolm Goldman
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By The National Extension College
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By Mr Michael Barrow, Barrow, Mr Michael
By Roger Till
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By David G. Kleinbaum, Mitchell Klein
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By Trudy A. Watt
By Perry R. Hinton, Hinton, Perry R.
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By AC BAJPAI