Past affiliation(s) within the IAU

• Past President of Executive Committee (1979-1982)
• Past Vice-President of Executive Committee (1970-1973)
• Past Vice-President of Executive Committee (1967-1970)
• Past President of Commission 12 Solar Radiation & Structure (1976-1979)
• Past Vice-President of Commission 12 Solar Radiation & Structure (1973-1976)
• Past Chair of Special Nominating Committee (1979-1982)
• Past Chair of Resolutions Committee (1976-1979)
• Past Advisor of Special Nominating Committee (1982-1985)
• Past Organizing Committee Member of Commission 12 Solar Radiation & Structure (1979-1982)
• Past Organizing Committee Member of Commission 38 Exchange of Astronomers (1976-1979)
• Past Organizing Committee Member of Commission 29 Stellar Spectra (1973-1976)
• Past Organizing Committee Member of Commission 29 Stellar Spectra (1970-1973)
• Past Organizing Committee Member of Commission 29 Stellar Spectra (1967-1970)
• Past Member of Commission 29 Stellar Spectra
• Past Member of Commission 38 Exchange of Astronomers
• Past Member of Commission 12 Solar Radiation & Structure (1979-1982)