In Workers 1, Michael Close uses the effect "Tearing a Two into Two Ones" as a "blow off" to the routine Dr. Strangetrick.
He lists Jerry Mentzer's "Close Up Cavalcade" and Ammar's "Encore 3" as sources for the Tearing a Two effect.
Which of these two sources are recommended? Are there other sources for the Tearing a Two into Two Ones effect?
Thanks for your help.