"USA." . . . . . . . . . . "Business and personal taxes, 1973 revision" . . . . . . . . . . . . . . . . . . "Business and personal taxes" . "Business and personal taxes"@en . "Impôt sur le revenu Etats-Unis." . . "Sociétés Etats-Unis Impôts." . . "Einkommensteuer." . .