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Jennings, Roger, "Instrumental Analysis of the Performance Characteristics of Rigid Urethane Foaming Systems ". Journal of Cellular Plastics (May/June, 1969).
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Benning, Calvin James, " Plastic Foams, Volume 1: Chemistry and Physics of Foam Formation," Interscience, New York, 1969, p. 221.
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6.
Process Specification 9992034: Determination of Rise-Rate Characteristics of Rigid Urethane Foam (November, 1967), The Bendix Corporation, Kansas City Division