National Foreign Assessment Center (U.S.). (1980). Estimating Soviet and East European hard currency debt. The Center.
Dyfyniad Arddull ChicagoNational Foreign Assessment Center (U.S.). Estimating Soviet and East European Hard Currency Debt. Washington, D.C.: The Center, 1980.
Dyfyniad MLANational Foreign Assessment Center (U.S.). Estimating Soviet and East European Hard Currency Debt. The Center, 1980.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.