Major Coal Producer and Union Reach a Tentative Agreement
Pittsburg & Midway Coal and UMW reach tentative contract settlement; William P Hobgood directed negotiations and kept them secret from Miller and Marshall; Marshall has reptdly gained private support of at least 2 major coal cos for voluntary return-to-work proposal under an interim natl coal labor contract, with hard issues to be negotiated later; Pres Carter and Vice Pres Mondale attend session of special coal emergency group; AFL-CIO pres George Meany gives approval to temporary Govt seizure of mines and invocation of Taft-Hartley Act's cooling-off period; protests and sabotage continue in many mining areas (M)