References
- R. P. GARDNER and R. L. ELY, Jr., Radioisotope Measurements Application in Engineering, Reinhold Publishing Corp., New York (1967).
- P. E. OHMART and H. L. COOK, Jr., “Applications of Radioactive Density Gaging to Process Measurements and Control,” Instr. Soc. Am. J., 2, 16 (1955).
- N. N. SHUMILOVSKII and L. V. MEL’TTSER, Radioactive Isotopes in Instrumentation and Control, translated by R. F. Kelleher, The Macmillan Co., New York (1964).
- W. L. NELSON, Petroleum Refining Engineering, McGraw-Hill Book Co., Inc., New York (1958).