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Worldwide occurrence of sporadic E.

APA Citation

Smith, E. K. (Ernest Ketcham). (1957). Worldwide occurrence of sporadic E. Washington: U.S. Dept. of Commerce, National Bureau of Standards.

Smith, Ernest K. (Ernest Ketcham). Worldwide Occurrence of Sporadic E. Washington: U.S. Dept. of Commerce, National Bureau of Standards, 1957.

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