Issue No.02 - February (1972 vol.21)
Anthony C. Davies , Department of Electrical and Electronic Engineering, the City University, London, England.
A proof is given of a method proposed by Lackey and Meltzer  for determining the selection of Rademacher functions that must be combined to generate a specified Walsh function. The method provides a convenient way of digitally controlling a Walsh function generator.
Anthony C. Davies, "On the Definition and Generation of Walsh Functions", IEEE Transactions on Computers, vol.21, no. 2, pp. 187-189, February 1972, doi:10.1109/TC.1972.5008924