Nos. 17430, 17472. June 18, 1964. Robert E. Conley, of Connolly, O'Malley Conley, Des Moines, Iowa, made argument for Chauffeurs, Teamsters and Helpers, Local Union 238, and filed brief for respondent in No. 17472. D.G. Ribble, Cedar Rapids, Iowa, made argument for Cedar Rapids Block Company, et al., petitioner in No. 17430, and filed brief with C.J. Lynch, Cedar Rapids. Richard P. Lawlor, Atty., N.L.R.B., Washington, D.C., made argument for N.L.R.B. and filed brief with Arnold Ordman, Gen. Counsel