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- [21] UNDERSTANDING UNINTERRUPTIBLE POWER-SUPPLIES .8. SPECIFYING UPS SYSTEMS EC&M-ELECTRICAL CONSTRUCTION AND MAINTENANCE, 1984, 83 (04): : 78 - 81
- [22] UNDERSTANDING UNINTERRUPTIBLE POWER-SUPPLIES .1. AC LINE ABERRATIONS EC&M-ELECTRICAL CONSTRUCTION AND MAINTENANCE, 1983, 82 (04): : 72 - &
- [23] UNDERSTANDING UNINTERRUPTIBLE POWER-SUPPLIES .10. UPS SYSTEMS CHECKLIST EC&M-ELECTRICAL CONSTRUCTION AND MAINTENANCE, 1984, 83 (07): : 75 - 77