Diffraction; coherence in optics, by M. Françon. Translated from the French by Barbara Jeffrey. Translation edited by J.H. Sanders. Diffraction. English Françon, M. (Maurice), 1913- Diffraction. QC415 .F823 1966 535.4 FRD Bibliography: p. 135-137. Oxford ; New York : Pergamon Press, 1966. 1966. 1966 Text ix, 139 p. : eng engfre The Commonwealth and international library. Physics division