English: Robert Holton "Bob" Ziegler (1921-1991) was an American lawyer and politician, who represented Ketchikan, Alaska and surrounding area in the Alaska Senate from 1965 to 1987.
Date
Source
Alaska Blue Book (Third edition), Alaska Department of Education, Division of State Libraries (1977)
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.