Google will soon open-source Google Earth Enterprise. TechCrunch. [2020-04-11] (美国英语). Google Earth VR Bringing the Whole Wide World to Virtual Reality. 2016-11-16
Six-Lesson Schoolteacher" (页面存档备份,存于互联网档案馆) – originally published in WholeEarthReview, Fall 1991 The Seven Lesson School Teacher (页面存档备份,存于互联网档案馆) A set