Portland Group for O.P.P. (Organised Purchasing Power) )Chairman: Joseph, Mr B)

Fraser, John Malcolm, Portland Group for O.P.P. (Organised Purchasing Power) )Chairman: Joseph, Mr B) (1970), [UMA-ITE-2005010702169]. University of Melbourne Archives, accessed 13/11/2025, https://archives.library.unimelb.edu.au/nodes/view/299970