- Author: Douglas Downing
- Language: English
- Year: 2015
- Author: Douglas Downing Ph.D.
- Language: English
- Year: 2009
Forgotten Statistics
epub
- Author: Douglas Downing, Jeff Clark
- Language: English
- Year: 1996
- Author: Douglas Downing, Jeff Clark
- Language: English
- Year: 1996
- Author: Douglas Downing
- Language: English
- Year: 2009
- Author: Douglas Downing
- Language: English
- Year: 2003
- Author: Douglas Downing, et al
- Language: English
- Year: 2009
E-Z Algebra
pdf
- Author: Douglas Downing
- Language: English
- Year: 2009
- Author: Douglas Downing
- Language: English
- Year: 2009