1. Archbold, E., Burch, J.M., Ennos, A.E. andTaylor, P.A., “Visual Observation of Surface Vibration Nodal Patterns,”Nature,222,263–265 (April 1969).
2. Leendertz, J.A., “Measurement of Surface Displacement by Interference of Speckle Patterns,”(1969 meeting of ICO-University of Reading), published in Optical Instruments and Techniques 1969, J. Home Dickson (editor),Oriel Press, Newcastle-on-Tyne, 256–264 (1970).
3. Burch, J.M., “Interferometry with Scattered Light,”Ibid(1969 meeting of ICO—University of Reading), published in, 213–229.
4. Archbold, E., Ennos, A.E. andTaylor, P.A., “A Laser Speckle Interferometer for the Detection of Surface Movements and Vibrations,”Ibid.(1969 meeting of ICO—University of Reading), published in, 265–275.
5. Leendertz, J.A., “Interferometric Displacement Measurement on Scattering Surfaces Utilizing Speckle Effect,”J. of Physics E., Sci. Inst.,3,214–218 (1970).