Board did not abuse discretion in holding that the per se effects of unfair labor practices outweighed single comment to the contrary in the record when considering effect on certification election; insufficient showing that subpoena quash prevented discovery of facts relevant to the certification election.
No futility exception for motions to the Board for reconsideration.
Challenged remedies upheld.
No error in denial of permission to intervene, since intervenor had options under the act, and the limitations of the remedy don't rise to constitutional levels.