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- [27] A PRACTICAL DIRECT READING ESI METER FOR FIELD USE JOURNAL OF THE ILLUMINATING ENGINEERING SOCIETY, 1980, 9 (04): : 247 - 251
- [28] A PRECISION, DIRECT-READING, COLOUR TEMPERATURE METER JOURNAL OF SCIENTIFIC INSTRUMENTS, 1958, 35 (12): : 449 - 452
- [30] METER READING ADVANCES BEYOND TEST PHASE WATER-ENGINEERING & MANAGEMENT, 1991, 138 (03): : 20 - &