Originally published in a slightly different form in 2017 Originally published in slightly different form in 2007 Originally published in a slightly different form in 1986 Originally published in a slightly different form in 1986. Originally published in slightly different format in 2014 Originally published in a different form in 2002 Originally published in different form in 2019 Originally published in slightly different form by Barron's in 2015. Originally published in a slightly different form by Mouseworks in 1999. "Originally self-published in slightly different form in 2016"--Preliminary.