Is an employer's refusal to sign a written contract in good faith a violation of section 8(d) of the Contractor's Bargaining Rights Act?

Section 8(d) of the Act provides that the duty to bargain in good faith encompasses the "execution of a written contract incorporating any agreement reached if requested by either party." 29 U.S.C. Sec. 158(d) (1988). Accordingly, an employer's refusal to sign an agreement embodying terms agreed upon is a violation of Section 8(a)(5) and (1) of the Act. H.J. Heinz Co. v. NLRB, 311 U.S. 514, 525-26, 61 S.Ct. 320, 325, 85 L.Ed. 309 (1941); NLRB v. Midvalley Steel Fabricators, Inc., 621 F.2d 49, 53 (2d Cir.1980).