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© 1962 Nature Publishing Group

Cobalt and the Fixation of Nitrogen by Root Nodules of Alnus and Casuarina

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Page 1: Cobalt and the Fixation of Nitrogen by Root Nodules of Alnus and Casuarina

© 1962 Nature Publishing Group

Page 2: Cobalt and the Fixation of Nitrogen by Root Nodules of Alnus and Casuarina

© 1962 Nature Publishing Group