References
- Jordan , H. S. Air Cleaning Costs—A Study of Three Systems . Proceedings of Fifth Atomic Energy Commission Air Cleaning Conference Held at Harvard Air Cleaning Laboratory . June 24-27 . pp. 98 – 107 . Boston Report TID-7551 (April 1958).
- Friedlander , S. K. , Silverman , L. , Drinker , P. and First , M. W. September 1952 . Handbook on Air Cleaning. Report AECD-3361 September ,
- Sill Claude , W. 1957 . Personal Communication