This image is a derivative work of the following images: File:Blank_vowel_trapezoid.png licensed with GFDL 2005-07-19T06:08:33Z Denelson83 1000x700 (5700
png Derivative works of this file: Blankvoweltrapezoid.svg English Trapezoid used to represent the IPA vowels. American English America language Canadian
Three height version of Image:Blankvoweltrapezoid.png. Derivative works of this file: Blankvoweltrapezoid-three-height.svg English determination method:
File:Blank_vowel_trapezoid-three-height.png licensed with GFDL 2005-09-05T08:26:57Z Cassowary 1000x700 (4508 Bytes) Three height version of [[:Image:Blank
English Great Vowel Shift Galician Esquema do Gran Desprazamento Vocálico. author name string: Goran tek-en URL: https://commons.wikimedia.org/wiki/user:Goran_tek-en