"Report of the evaluative committee for Econometrica". Paper by Paul Samuelson, Tjalling Koopmans, and Richard Stone. Econometrica - journal of the Econometric Society, pp. 141-146, 1954.
"The Feynman Lectures on Physics". Physics textbook by Richard P. Feynman, Robert B. Leighton, and Matthew Sands, volume I; lecture 44, "The Laws of Thermodynamics"; section 44-1, "Heat engines; the first law"; p. 44-2, 1964.
H. P. Lovecraft (2014). “Complete Collection Of H. P. Lovecraft - 150 eBooks With 100+ Audiobooks (Complete Collection Of Lovecraft's Fiction, Juvenilia, Poems, Essays And Collaborations)”, p.1055, Ageless Reads