Single- and double-acting cylinders (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Single- and double-acting cylinders" in English language version.

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3books.google.com

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archive.org

Hawkins, Nehemiah (1897). New Catechism of the Steam Engine. New York: Theo Audel. pp. 110–113.

books.google.com

Hills, Richard L. (1989). Power from Steam. Cambridge University Press. pp. 63, 66. ISBN 0-521-45834-X.
Smith, Edgar C. (2013) [1938]. A Short History of Naval and Marine Engineering. Cambridge University Press. pp. 334–336. ISBN 9781107672932.
"Amazing Airplane Motor Doubles The Power", Popular Mechanics, September 1932 cutaway drawing of double action aircraft engine