REFERENCES
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- Fitch , E. C. , “ Contamination Tolerance Levels in Hydraulic Systems ”, Proc. Fluid Power Research Conf. , Oklahoma State University ( Stillwater, Oklahoma ) 1967 .
- Reed , R. E. and Long , D. E. , “ Concepts on Description of Contamination Levels ”, Fluid Controls and Systems Center, Oklahoma State University ( Stillwater, Oklahoma ) 1967 , Information Report No. 67–5.
- Fitch , E. C. , “ A New and Fundamental Criteria for Specifying the Cleanliness Levels of Fluids for Industrial and Aerospace Utilization ”, New York Academy of Science Liquid-Borne Particle Metrology Conference Monograph 68–10 , 1968 .
- Fitch , E. C. ; Reed , R. E. and Long , D. E. , “ NASA Filtration Mechanics Project Annual Report 1967–1968 ”, Oklahoma State University ( Stillwater, Oklahoma ), 1968 .