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2. A. D. Keith and W. Snipes, Viscosity of cellular protoplasm, Science 183:666 (1974).
3. R. P. Blakemore, Magnetotactic bacteria, Science 190:377 (1975).
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5. These standard techniques are described in, J. B. Marion and M. A. Heald. “Classical Electromagnetic Radiation,” Harcourt Brace Jovanovich, New York (1980).