The 1971 Economic Report of the President: Part 2 .-- Washington : U.S. Government Printing Office , 1971
.--v. 23 cm.
En cub.: Hearings before the Joint Economic Committee Congress of theUnited States : Ninety-Second Congress, First Session: February 22, 23, 24, 25,and 26, 1971
ESTADOS UNIDOS
POLITICA ECONOMICA