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- [32] ASSESSING EXPOSURE TO RADON IN THE UNITED-STATES - PERSPECTIVE OF THE ENVIRONMENTAL-PROTECTION-AGENCY ACS SYMPOSIUM SERIES, 1987, 331 : 63 - 69
- [40] IMPACT OF ENVIRONMENTAL-PROTECTION MEASURES ON UNITED-STATES-ECONOMY SOVIET GEOGRAPHY REVIEW AND TRANSLATION, 1977, 18 (10): : 764 - 768