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- [5] WHATS SO NATURAL ABOUT E .2. RELATIONSHIP OF EULER NUMBER TO LOGARITHMS WIRELESS WORLD, 1980, 86 (1530): : 51 - 54
- [6] WHATS SO NATURAL ABOUT E .3. USES OF E, INCLUDING SOME IN ELECTRICAL SCIENCE WIRELESS WORLD, 1980, 86 (1532): : 79 - 82