| Label | Id | |
|---|---|---|
| local survey | PROC | |
| national survey | PROC | |
| demographic study | PROC | |
| poll | PROC | |
| social survey | PROC | |
| Social survey | PROC | |
| polls | PROC | |
| Poll | PROC | |
| state survey | PROC | |
| telephone survey | PROC | |
| telephone surveys | PROC | |
| study of one area, group, or program | PROC | |
| multiple group designs | PROC | |
| research involving two or more groups | PROC | |
| research involving two or more studies | PROC |