Combining and Merging SAS Datasets
Mixed Modeling:
SASŪ System
for Mixed Models
Littell, Miliken, Stroup, Wolfinger
1996 SAS Institute, Inc., Cary, NC, USA
3rd printing, 1999
SASŪ programming:
The Little
SASŪ Book, 2nd edition
Lora D. Delwiche and Susan J. Slaughter
1998 SAS Institute, Inc., Cary, NC, USA