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Indians of North America --- Antiquities --- Southern States --- Antiquities.
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Soil pollution. Soil purification --- USA: South --- USA: East --- 551.577.13 --- 631.415.2 --- 630*11 <75> --- Acid deposition --- -Forest soils --- -Soil acidity --- -Acidity of soils --- Hydrogen-ion concentration --- Acid soils --- Soils --- Acidic deposition --- Deposition, Acid --- Pollutants --- Acidity of precipitation, acid rain --- Acidity. Acid soils --- Site factors. Climate, situation, soil in forestry. Forest hydrology and meteorology--Verenigde Staten van Amerika: Zuid-Oostelijke staten --- Environmental aspects --- -551.577.13 --- -Acidity of precipitation, acid rain --- 630*11 <75> Site factors. Climate, situation, soil in forestry. Forest hydrology and meteorology--Verenigde Staten van Amerika: Zuid-Oostelijke staten --- 631.415.2 Acidity. Acid soils --- 551.577.13 Acidity of precipitation, acid rain --- -Soil pollution. Soil purification --- -631.415.2 Acidity. Acid soils --- Acidity of soils --- -Acid deposition --- Forest soils --- Soil acidity --- Southern States
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