REFERENCES
- Shaw (A). Liquid-Level Measurement in Seven Ways Control and Instrumentation. 5, 1–11; 1973; 26–28.
- Frasher (G). Getting to Know All about Liquid-Level Measurement. Ibid. 6, 1–11; 1974; 34–37.
- Powley (C). Surveying the Field of Liquid-Level Measurement. Ibid. 6, 8; 1974; 39–47.
- Cheshire (K B). The use of Digital Indicators in Process Control. Ibid. 4, 2; 1972; 39–41.
- Norton (H N). Handbook of Transducers for Electronic Measuring Systems. 1969. Prentice-Hall Inc, Englewood Cliffs. NJ.
- Millman (J) and Halkias (C C). Integrated Electronics: Analog Digital Circuits and Systems. 1972. McGraw-Hill Book Co. Inc, Tokyo.
- Millman (J) and Taub (H). Pulse, Digital and Switching Waveforms. 1965. McGraw-Hill Book Co. Inc. Tokyo.
- The TTL Dala Book for Design Engineers. 1973, Texas Instruments Staff.
- Raven (M S) and Raven (D). New Approaches to the Direct Measurement of Capacitance. Electro Component Science and Technology. 4, 1; 1977; 37–42.