An examination of the relationship between arbitration and the NLRB. Includes discussion of Board deferral to arbitration in unfair labor practice and representation cases, both where arbitration has been used and where it is available but has not been used; the duty to furnish information relevant to contract administration; and arguably invalid contract clauses. Also discusses the disagreement among arbitrators in handling unfair labor practice issues. [See also 1967, pages 111, 142, 173 and 202.]