William Barclay (1964) The Gospel of John. Vol. 2, p. 77
“But if the labourers could live on air they could not be bought at any price.”
Vol. I, Ch. 24, Section 4, pg. 657.
(Buch I) (1867)
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Karl Marx 290
German philosopher, economist, sociologist, journalist and … 1818–1883Related quotes

Introduction to H. Hills and M. Woods, Industrial Unrest: A Practical Solution (1914)

Greenspan in 1959. http://www.safehaven.com/article-171.htm.
1950–60s

“Love at the lips was touch
As sweet as I could bear;
And once that seemed too much;
I lived on air”
" To Earthward http://www.poemhunter.com/poem/to-earthward-2/", st. 1 (1923)
1920s

Source: The Principles of Political Economy and Taxation (1821) (Third Edition), Chapter XVI, Taxes on Wages, p. 141

Source: (1776), Book IV, Chapter II