Peterson's four-year colleges 2008. Peterson's four-year colleges 2010. Peterson's four year colleges, 2002 Peterson's 4-year colleges 2008 Peterson's 2 year colleges 2002. Peterson's two year colleges 2002. Peterson's two-year colleges 2010. Peterson's 2 year colleges 2002 Peterson's 2 year colleges 2010 Peterson's 4 year colleges 2010