"MAKING ENDS MEET / The well-off are better off, but the ranks of the poor are growing, and middle- and low-income workers feel pressure of high prices" by Jason B. Johnson, www.sfgate.com. September 28, 2005.
Henry David Thoreau, Jeffrey S. Cramer (2007). “I to Myself: An Annotated Selection from the Journal of Henry D. Thoreau”, p.346, Yale University Press