Urone, Paul Peter. College physics, 2013: title page (OpenStax College) page 2 (Rice University, 6100 Main Street, MS-380, Houston, Texas, 77005)

Chemistry, 2016: pref. (OpenStax is a non-profit organization committed to improving student access to quality learning materials; an initiative of Rice University) t.p. verso (Rice University, 6100 Main Street, MS-375, Houston, Texas, 77005)

Wikipedia, Oct. 10, 2017: OpenStax (OpenStax (formerly OpenStax College) is a nonprofit ed tech initiative based at Rice University. Since 2012, OpenStax has created peer-reviewed, openly licensed textbooks, which are available in free digital formats and for a low cost in print)