Subjects: ELECTRIC power production; ELECTRIC power transmission; ELECTRIC power distribution
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Subjects: SUNTAN; PHYSIOLOGICAL effects of solar radiation; HUMAN skin colorUNITED States
Subjects: LAND use; CONFERENCES & conventions; PUBLIC landsUNITED States
Subjects: COMMON cold; RESPIRATORY infections; PATHOLOGYUNITED States
Subjects: HUMAN migrations; AGRICULTURE; UNITED States. Dept. of AgricultureUNITED States
Subjects: UNEMPLOYMENT; SCIENCE & industry; EMPLOYMENTUNITED States; EUROPE
Subjects: PROPAGANDA; DEBT management; INTERNATIONAL relationsUNITED States; FRANCE
Subjects: ROOSEVELT, Franklin D. (Franklin Delano), 1882-1945; REFORESTATION; TREE plantingCALIFORNIA; UNITED States
Subjects: POLITICAL science; POLICY sciencesSOVIET Union; UNITED States
Subjects: FORESTS & forestry; GOVERNMENT ownership; NATURAL resourcesUNITED States