| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| marc 21 | 0.03 | 0.4 | 4908 | 63 |
| marc 21 bibliographic | 0.76 | 0.2 | 5522 | 85 |
| marc 21 format | 1.72 | 0.3 | 9013 | 57 |
| marc 21 245 | 1.54 | 0.1 | 463 | 10 |
| marc 21 008 | 1.37 | 0.6 | 5841 | 48 |
| marc 21 pdf | 1.13 | 0.5 | 5169 | 89 |
| marc 21 puc rio | 1.61 | 0.2 | 6965 | 66 |
| marc 21 650 | 1.66 | 0.3 | 3951 | 73 |
| marc 21 100 | 0.47 | 0.5 | 1052 | 12 |
| marc 21 246 | 1.81 | 0.5 | 232 | 75 |
| marc 21 campo t028 | 0.16 | 0.3 | 2935 | 17 |
| marc 21 authority | 0.38 | 0.6 | 8798 | 68 |
| marc 21 format for bibliographic data | 1.38 | 0.6 | 7486 | 62 |
| marc 21 language codes | 1.4 | 0.1 | 8669 | 97 |
| marc 21 autoridades | 1.21 | 0.4 | 6419 | 17 |
| marc 21 relator terms | 0.38 | 1 | 2210 | 41 |
