Richard Bellman. A Survey of the Mathematical Theory of TimeLag, Retarded Control, and Hereditary Processes. Published by the Rand Corporation, Santa Barbara, March 1, 1954. R-256. 9x6 inches. 106pp. Stiff paper boards, with printed spine label. A very nice copy of this book in the problematc Rand format.
Full text pdf of a slightly different version of this book, from Rand, here
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