Last week's article on the Laborers' International union, "A Corrupt Union and the Mob," mistakenly attributed a quotation to Arthur E. Coia, father of the union's current president. It was not Coia but rather his pal, New England mafia boss Raymond L.S. Patriarca, who was overheard by the FBI meddling in union elections and espousing the operating philosophy, "Hit them, break their legs to get things your way."