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- Havrella, Raymond A.
Havrella, Raymond A. (Nombre personal)
His Heating, ventilating, and air-conditioning fundamentals, 1980: t.p. (Raymond A. Havrella, El Camino College)
His Heating, ventilating, and air-conditioning fundamentals, 1980: t.p. (Raymond A. Havrella, El Camino College)