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1Foilsithe / Cruthaithe 1967“...Institution of Mechanical Engineers. Proceedings, 1966-67, v. 181, pt. 3M...”
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2Foilsithe / Cruthaithe 1969“...Institution of Mechanical Engineers. Proceedings, 1968-69, v. 183, pt. 3M...”
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4Foilsithe / Cruthaithe 1993LEABHAR