| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| operation paperclip and mk ultra | 1.66 | 0.6 | 6027 | 61 |
| operation paperclip mk ultra | 1.59 | 0.8 | 5052 | 51 |
| project paperclip mk ultra | 1.12 | 0.4 | 2515 | 62 |
| russian version of operation paperclip | 0.25 | 0.2 | 242 | 89 |
| mk ultra documents released | 1.34 | 0.4 | 4690 | 49 |
| was operation paperclip real | 0.55 | 0.9 | 7238 | 2 |
| soviet version of operation paperclip | 1.24 | 0.3 | 2280 | 67 |
| movies about operation paperclip | 1.52 | 0.3 | 836 | 50 |
| operation paperclip book pdf | 1.89 | 0.8 | 1463 | 12 |
| books about operation paperclip | 1.52 | 0.3 | 3609 | 37 |
| mk ultra cia documents | 0.27 | 0.1 | 8609 | 22 |
| mk ultra documents pdf | 0.92 | 0.2 | 7059 | 15 |
| what is operation paperclip | 0.26 | 0.2 | 8311 | 61 |
