Image: 1974 GM Rotory engine
Description: 1974 GM Rotory engine
Title: 1974 GM Rotory engine
Credit: GM parts newsletter cropped image
Author: General Motors pre-1978
Permission: This work is in the public domain because it was published in the United States between 1923 and 1977 and without a copyright notice. Unless its author has been dead for several years, it is copyrighted in jurisdictions that do not apply the rule of the shorter term for US works, 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. See this page for further explanation. Беларуская | Čeština | Deutsch | English | Español | Français | Italiano | 日本語 | Македонски | Nederlands | Português | Русский | Slovenščina | ไทย | +/−
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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