| |||
| key precursor; precursor | |||
| chemical precursor; precursor substance | |||
|
prekursor : 12 phrases in 6 subjects |
| Chemistry | 1 |
| General | 5 |
| Health care | 3 |
| Law | 1 |
| Social science | 1 |
| Sociology | 1 |
| |||
| key precursor; precursor | |||
| chemical precursor; precursor substance | |||
|
prekursor : 12 phrases in 6 subjects |
| Chemistry | 1 |
| General | 5 |
| Health care | 3 |
| Law | 1 |
| Social science | 1 |
| Sociology | 1 |