| Clue | Source | Date |
|---|---|---|
| *Collective bargaining tactic | Wall Street Journal | 27 Aug 2024 |
| Withholding that might lead to a bigger paycheck | ||
| Mass refusal to work | Universal | 02 Feb 2024 |
| Reason for some picket lines | USA Today | 20 May 2023 |
| What a picket line may signify | USA Today | 07 Sep 2017 |
| What a picket line may signify | ||
| Wildcatters' action | ||
| Wildcatters' action |