Beckerman, W. (1960). International comparisons of real incomes. United State: E.C.O.D.
Dyfyniad Arddull ChicagoBeckerman, Wilfred. International Comparisons of Real Incomes. United State: E.C.O.D, 1960.
Dyfyniad MLABeckerman, Wilfred. International Comparisons of Real Incomes. United State: E.C.O.D, 1960.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.