 | Manganese toxicity of legumes seeded in Kentucky strip-mine spoils | (1) |
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 | Manganese toxicity of legumes seeded in Kentucky strip-mine spoils / by W.A. Berg and W.G. Vogel. Berg, W. A. (William Albert), 1930- cn Upper Darby, Pa. : Northeastern Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1968. | |
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