This may not be a complete list of all calls authored by George Etzel.
Trade And Swing
Jay King - page 90
From a wave: Centers Trade then swing half on the ends. If centers have right hands joined, then this movement would be called simply Swing Thru; if centers have left hands joined, then it would be a Left Swing Thru. Finishes in a wave.
George Etzel 1972
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.