| Finding A Common Unit |
1981 |
AGENCY FOR INSTRUCTIONAL TECHNOLOGY |
|
16mm |
|
sound |
| Numerical Comparisons |
1981 |
AGENCY FOR INSTRUCTIONAL TECHNOLOGY |
|
16mm |
|
sound |
| Percent |
1981 |
AGENCY FOR INSTRUCTIONAL TECHNOLOGY |
|
16mm |
|
sound |
| Proportion |
1981 |
AGENCY FOR INSTRUCTIONAL TECHNOLOGY |
|
16mm |
|
sound |