Show Marine Unions Seek Arbitration Tribunal Tribuna SAN FRANCISCO May 4 IF- IF Immediate selection of a federal arbitration arbitration ar ar- ar b board ard to avert a general genera shipping up tie as an outgrowth of the Pacific coast const oil tanker strike was sought today oday by six marine unions Telegrams asking action were dispatched dispatched dis dis- dis patched yesterday to President nt Roosevelt Roosevelt Roose Roose- velt Secretary of Labor Frari Frances s Perkins Perkins Perkins Per Per- kins and Secretary of Commerce Daniel Dan Danid id iel C. C Roper |