From September 1 to November 30, 1967, he worked at the Entomology Research Institute at Canada's Department of Agriculture in Ottawa and participated in the International Congress of Entomology in Canberra from August 22 to 30, 1972.
Vom 1. September bis zum 30. November 1967 arbeitete er am Entomology Research Institute des Canada Department of Agriculture in Ottawa und nahm vom 22. bis 30. August 1972 am Internationalen Entomologenkongress in Canberra teil.