Talk:Trapezoid E

Sources?
--- Another Believer ( Talk ) 04:25, 30 June 2021 (UTC)
 * https://www.newspapers.com/newspage/72964616/
 * https://www.gsa.gov/cdnstatic/GEMbook.pdf
 * https://books.google.com/books?id=FLUNei9i-RcC&pg=PR10&lpg=PR10&dq#v=onepage&q&f=false
 * https://www.eugeneweekly.com/2018/01/25/letters-to-the-editor-jan-25-2018/