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200 1 $a<<The >>design and analysis of sequential clinical trials$fJohn Whitehead.
205   $aRev. 2. ed.
210   $aNew York$cJ. Wiley and Sons$dc 1997.
215   $aXIV, 314 p.$d23 cm
676   $a519.5
700  1$aWhitehead,$bJohn$f<1950- >$067567
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996   $aDesign and analysis of sequential clinical trials$9376856
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