https://support.sas.com/documentation/cdl/en/statug/63962/HTML/default/statug_surveyselect_sect013.htm
PROC SURVEYSELECT: Details :: SAS/STAT(R) 9.3 User's Guide
procdetailssasstat
https://support.sas.com/documentation/cdl/en/statug/63962/HTML/default/statug_surveyselect_sect011.htm
PROC SURVEYSELECT: SIZE Statement :: SAS/STAT(R) 9.3 User's Guide
https://support.sas.com/documentation/cdl/en/statug/63962/HTML/default/statug_surveyselect_sect026.htm
PROC SURVEYSELECT: Proportional Allocation :: SAS/STAT(R) 9.3 User's Guide
https://support.sas.com/documentation/cdl/en/statug/63962/HTML/default/statug_surveyselect_sect010.htm
PROC SURVEYSELECT: SAMPLINGUNIT | CLUSTER Statement :: SAS/STAT(R) 9.3 User's Guide
https://support.sas.com/documentation/cdl/en/statug/63962/HTML/default/statug_surveyselect_sect002.htm
PROC SURVEYSELECT: Getting Started :: SAS/STAT(R) 9.3 User's Guide
getting started
https://support.sas.com/documentation/cdl/en/statug/63962/HTML/default/statug_surveyselect_sect006.htm
PROC SURVEYSELECT: Syntax :: SAS/STAT(R) 9.3 User's Guide
procsyntaxsasstat
https://support.sas.com/documentation/cdl/en/statug/63962/HTML/default/statug_surveyselect_a0000000206.htm
PROC SURVEYSELECT: Sample Size Allocation :: SAS/STAT(R) 9.3 User's Guide
https://support.sas.com/documentation/cdl/en/statug/63962/HTML/default/statug_surveyselect_sect008.htm
PROC SURVEYSELECT: CONTROL Statement :: SAS/STAT(R) 9.3 User's Guide
https://support.sas.com/documentation/cdl/en/statug/63962/HTML/default/statug_surveyselect_sect018.htm
PROC SURVEYSELECT: Sample Output Data Set :: SAS/STAT(R) 9.3 User's Guide
https://support.sas.com/documentation/cdl/en/statug/63962/HTML/default/statug_surveyselect_sect027.htm
PROC SURVEYSELECT: References :: SAS/STAT(R) 9.3 User's Guide
procreferencessasstat
https://support.sas.com/documentation/cdl/en/statug/63962/HTML/default/statug_surveyselect_sect022.htm
PROC SURVEYSELECT: Examples :: SAS/STAT(R) 9.3 User's Guide
procexamplessasstat
https://support.sas.com/documentation/cdl/en/statug/63962/HTML/default/statug_surveyselect_sect004.htm
PROC SURVEYSELECT: Stratified Sampling :: SAS/STAT(R) 9.3 User's Guide
stratified sampling