At the closing Plenary Session of the XVth World Poultry Congress held in New Orleans in August 1974 the Treasurer of the WPSA was presented with the Macdougall Medal. In making the presentation on behalf of the Association the Secretary said that the award was the highest within the power of the Association to give and that the medal was given solely for efforts materially benefiting the WPSA on the recommendation of the Council. On these grounds Dr Jaap fully deserved the award, which was only the fourth given in the history of the Association. Dr Jaap had been Treasurer for over seventeen years. He had been the Editor of the Association's Journals for fifteen years and had served the WPSA well in many capacities.
World's Poultry Science Journal (1974) 30(4): 319