Postprint version. Published in Handbook of Biological Effects of Electromagnetic Fields, January 1, 1986, pages 169-196.
NOTE: At the time of publication, the author Richard B. Frankel was not yet affiliated with Cal Poly.
1986 Taylor & Francis.
This is an electronic version of an article published in Handbook of Biological Effects of Electromagnetic Fields. The definitive version is available at http://www.taylorandfrancis.com.