20 resultados para Standardization of bioremediation


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Newton J. T. Bigelow, chairman, Philip E. Hagerty, director of research.

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Revision of Circular no. 163: Organizing and teaching a one-teacher school. cf. Foreword.

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Cover title.

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Corrected to <1925; 1929; July 1, 1931; Oct. 1, 1949>.