共 50 条
- [7] IMPACT OF ENVIRONMENTAL-CONTROL EXPENDITURES ON UNITED-STATES CU, PB AND ZN MINING AND SMELTING [J]. JOURNAL OF METALS, 1978, 30 (01): : 24 - 29
- [8] EFFECTIVE UNITED-STATES CONTROL [J]. JOURNAL OF MARITIME LAW AND COMMERCE, 1977, 8 (03): : 337 - 347
- [9] RATES AND COSTS OF UNITED-STATES POSTAL SERVICE [J]. JOURNAL OF LAW & ECONOMICS, 1973, 16 (01): : 89 - 117