| referencemateriale abbr. | |
| industr. | reference material |
| work.fl. commun. | reference work |
| referencematerialer abbr. | |
| el. industr. | reference materials |
|
certificeret : 23 phrases in 10 subjects |
| Agriculture | 9 |
| Energy industry | 1 |
| General | 1 |
| Medical | 1 |
| Metallurgy | 1 |
| Microsoft | 1 |
| Natural sciences | 1 |
| Social science | 2 |
| Technology | 1 |
| Transport | 5 |