Stokes, Maura Ellen. <br/><br/>
Categorical data analysis using the SAS system, 2nd edition  [eBook] / 
Maura E. Stokes, Charles S. Davis, Gary G. Koch. 
 - 2nd ed. 
, Computer document. 
 - Cary, N.C. :  [S.l.] :  SAS Institute ;  Wiley,  c2000 
 - Books 24x7 IT PRO. .