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2. Katz, R. W.: 1977, ?Sensitivity Analysis of Statistical-Weather Models?, in preparation.
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4. Marquardt, D. W. and Snee, R. D.: 1975, ?Ridge Regression in Practice?, Amer. Statistician 29, 3?20.
5. National Academy of Sciences: 1975, Economic Impact of Stratospheric Flight, Washington, D.C.