1. Determination of biological impedances;Schwan,1963
2. Model 185, Wavetek, Inc., Box 651, San Diego, CA.
3. Model 5740, Data Precision Corporation, Audubon Road, Wakefield, MA 01880.
4. Model AM503, Tektronix, Inc., P.O. Box 500, Beaverton, OR 97077.
5. Model 305-PA-3009A, Dranetz Engineering Laboratories, Inc., South Plainfield, NJ 07080.