References
- Arnold C. R., Rolls P. J., Stewart J. C. J. Applied Photography. Focal Press. 1971; 416–419
- Burton R. A. A modified schlieren apparatus for large areas of field. J.O.S.A. 1949; 39: 907–908
- Holder D. W., North R. J. National Physics Laboratory Notes on Applied Science, No 31, Schlieren Methods. HMSO, London 1963
- Mortensen T. A. An improved schlieren appratus employing multiple slit gratings. Rewews of Scientific Instruments 1950; 21: 306