
Source: 1880s, Incidents and Anecdotes of the Civil War (1885), p. 212
The Power Elite (1956)
Source: 1880s, Incidents and Anecdotes of the Civil War (1885), p. 212
Source: 1880s, Incidents and Anecdotes of the Civil War (1885), pp. 202– 203
Source: The Tales of Alvin Maker, Red Prophet (1988), Chapter 14.
Ensign Richard Sharpe to the Light Company of the 33rd Regiment of Foot, p. 261
Sharpe (Novel Series), Sharpe's Fortress (1999)
“There is a saying that we provide the machines with an end, and they provide us with the means.”
“Descendant” (p. 40)
Short fiction, The State of the Art (1991)
The Burning World, pp. 57-58
The Unexpected Dimension (1960)
To Make Men Free: A History of the Republican Party https://books.google.com/books?id=s-JzAgAAQBAJ&pg=PP2&dq=to+make+men+free+a+history&hl=en&sa=X&ved=0CCIQ6AEwAWoVChMIq97csor9xwIVRJkeCh3tvg7i#v=onepage&q=to%20make%20men%20free%20a%20history&f=false (2014), p. ix
"Ценность науки в предвидении" https://vpk-news.ru/articles/14632 (26 February 2013)